diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1da0df3a3..16ac704c9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,3 +10,5 @@ Master branch
 - [aggregate by activity type] fix translation in aggregate activity type
 - fix some translation in export
 - fix error when persons not loaded by other aggregators / filters
+- add "filter by activity type" filter
+
diff --git a/Export/Filter/ActivityTypeFilter.php b/Export/Filter/ActivityTypeFilter.php
new file mode 100644
index 000000000..b3616da10
--- /dev/null
+++ b/Export/Filter/ActivityTypeFilter.php
@@ -0,0 +1,148 @@
+<?php
+
+/*
+ * Copyright (C) 2018 Champs-Libres <info@champs-libres.coop>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace Chill\ActivityBundle\Export\Filter;
+
+use Chill\MainBundle\Export\FilterInterface;
+use Doctrine\ORM\QueryBuilder;
+use Symfony\Component\Form\FormBuilderInterface;
+use Symfony\Bridge\Doctrine\Form\Type\EntityType;
+use Chill\MainBundle\Templating\TranslatableStringHelper;
+use Doctrine\ORM\Query\Expr;
+use Symfony\Component\Security\Core\Role\Role;
+use Chill\ActivityBundle\Security\Authorization\ActivityStatsVoter;
+use Doctrine\ORM\EntityRepository;
+use Doctrine\ORM\Query\Expr\Join;
+use Symfony\Component\Validator\Context\ExecutionContextInterface;
+use Chill\MainBundle\Export\ExportElementValidatedInterface;
+use Chill\ActivityBundle\Entity\ActivityType;
+
+/**
+ * 
+ *
+ */
+class ActivityTypeFilter implements FilterInterface,
+   ExportElementValidatedInterface
+{
+    /**
+     *
+     * @var TranslatableStringHelper
+     */
+    protected $translatableStringHelper;
+    
+    /**
+     * The repository for activity reasons
+     *
+     * @var EntityRepository
+     */
+    protected $typeRepository;
+    
+    public function __construct(
+            TranslatableStringHelper $helper,
+            EntityRepository $typeRepository
+    ) {
+        $this->translatableStringHelper = $helper;
+        $this->typeRepository = $typeRepository;
+    }
+    
+    
+    public function alterQuery(QueryBuilder $qb, $data)
+    {
+        $where = $qb->getDQLPart('where');
+        $clause = $qb->expr()->in('activity.type', ':selected_activity_types');
+
+        if ($where instanceof Expr\Andx) {
+            $where->add($clause);
+        } else {
+            $where = $qb->expr()->andX($clause);
+        }
+        
+        $qb->add('where', $where);
+        $qb->setParameter('selected_activity_types', $data['types']);
+    }
+    
+    /**
+     * Check if a join between Activity and Reason is already defined
+     * 
+     * @param Join[] $joins
+     * @return boolean
+     */
+    private function checkJoinAlreadyDefined(array $joins, $alias)
+    {
+        foreach ($joins as $join) {
+            if ($join->getAlias() === $alias) {
+                return true;
+            }
+        }
+        
+        return false;
+    }
+
+    public function applyOn()
+    {
+        return 'activity';
+    }
+
+    public function buildForm(FormBuilderInterface $builder)
+    {
+        //create a local copy of translatableStringHelper
+        $helper = $this->translatableStringHelper;
+        
+        $builder->add('types', EntityType::class, array(
+            'class' => ActivityType::class,
+            'choice_label' => function (ActivityType $type) use ($helper) {
+                return $helper->localize($type->getName());
+            },
+            'multiple' => true,
+            'expanded' => false
+        ));
+    }
+    
+    public function validateForm($data, ExecutionContextInterface $context)
+    {
+        if ($data['types'] === null || count($data['types']) === 0) {
+            $context->buildViolation("At least one type must be choosen")
+                ->addViolation();
+        }
+    }
+
+        public function getTitle()
+    {
+        return 'Filter by activity type';
+    }
+    
+    public function addRole()
+    {
+        return new Role(ActivityStatsVoter::STATS);
+    }
+    
+    public function describeAction($data, $format = 'string')
+    {
+        // collect all the reasons'name used in this filter in one array
+        $reasonsNames = array_map(
+                function(ActivityType $t) {
+                    return "\"".$this->translatableStringHelper->localize($t->getName())."\"";
+                },
+                $this->typeRepository->findBy(array('id' => $data['types']->toArray()))
+                );
+        
+        return array("Filtered by activity type: only %list%", 
+            ["%list%" => implode(", ", $reasonsNames)]);
+    }
+}
diff --git a/Resources/config/services/export.yml b/Resources/config/services/export.yml
index cb6ff5f52..61d5cc18b 100644
--- a/Resources/config/services/export.yml
+++ b/Resources/config/services/export.yml
@@ -31,6 +31,14 @@ services:
         tags:
             - { name: chill.export_filter, alias: 'activity_reason_filter' }
             
+    chill.activity.export.type_filter:
+        class: Chill\ActivityBundle\Export\Filter\ActivityTypeFilter
+        arguments:
+            - "@chill.main.helper.translatable_string"
+            - "@chill_activity.repository.activity_type"
+        tags:
+            - { name: chill.export_filter, alias: 'activity_type_filter' }
+            
     chill.activity.export.date_filter:
         class: Chill\ActivityBundle\Export\Filter\ActivityDateFilter
         arguments:
diff --git a/Resources/translations/messages.fr.yml b/Resources/translations/messages.fr.yml
index 55e367d32..edbaa0967 100644
--- a/Resources/translations/messages.fr.yml
+++ b/Resources/translations/messages.fr.yml
@@ -119,7 +119,7 @@ Number of activities: Nombre d'activités
 #filters
 Filter by reason: Filtrer par sujet d'activité
 'Filtered by reasons: only %list%': 'Filtré par sujet: seulement %list%'
-
+'Filtered by activity type: only %list%': "Filtré par type d'activity: seulement %list%"
 Filtered by date activity: Filtrer par date d'activité
 Activities after this date: Activités après cette date
 Activities before this date: Activités avant cette date
@@ -132,6 +132,7 @@ Implied in an activity before this date: Impliqué dans une activité avant cett
 Filtered by person having an activity between %date_from% and %date_to% with reasons %reasons_name%: Filtré par personnes associées à une activité entre %date_from% et %date_to% avec les sujets %reasons_name%
 Activity reasons for those activities: Sujets de ces activités
 
+Filter by activity type: Filtrer par type d'activité
 
 #aggregators
 Aggregate by activity reason: Aggréger par sujet de l'activité