diff --git a/.changes/unreleased/Feature-20240122-124849.yaml b/.changes/unreleased/Feature-20240122-124849.yaml
new file mode 100644
index 000000000..82703bd2c
--- /dev/null
+++ b/.changes/unreleased/Feature-20240122-124849.yaml
@@ -0,0 +1,6 @@
+kind: Feature
+body: '[Export][List of accompanyign period] Add two columns: the list of persons
+  participating to the period, and their ids'
+time: 2024-01-22T12:48:49.824833412+01:00
+custom:
+  Issue: "241"
diff --git a/src/Bundle/ChillPersonBundle/Export/Helper/ListAccompanyingPeriodHelper.php b/src/Bundle/ChillPersonBundle/Export/Helper/ListAccompanyingPeriodHelper.php
index 9b8902ba6..2c2bc1d02 100644
--- a/src/Bundle/ChillPersonBundle/Export/Helper/ListAccompanyingPeriodHelper.php
+++ b/src/Bundle/ChillPersonBundle/Export/Helper/ListAccompanyingPeriodHelper.php
@@ -18,6 +18,7 @@ use Chill\MainBundle\Export\Helper\ExportAddressHelper;
 use Chill\MainBundle\Export\Helper\UserHelper;
 use Chill\MainBundle\Templating\TranslatableStringHelperInterface;
 use Chill\PersonBundle\Entity\AccompanyingPeriod;
+use Chill\PersonBundle\Entity\AccompanyingPeriodParticipation;
 use Chill\PersonBundle\Entity\Household\PersonHouseholdAddress;
 use Chill\PersonBundle\Entity\SocialWork\SocialIssue;
 use Chill\PersonBundle\Repository\PersonRepository;
@@ -40,6 +41,8 @@ final readonly class ListAccompanyingPeriodHelper
         'closingDate',
         'referrer',
         'referrerSince',
+        'acpParticipantPersons',
+        'acpParticipantPersonsIds',
         'administrativeLocation',
         'locationIsPerson',
         'locationIsTemp',
@@ -79,6 +82,7 @@ final readonly class ListAccompanyingPeriodHelper
         private TranslatableStringHelperInterface $translatableStringHelper,
         private TranslatorInterface $translator,
         private UserHelper $userHelper,
+        private LabelPersonHelper $labelPersonHelper,
     ) {
     }
 
@@ -110,7 +114,20 @@ final readonly class ListAccompanyingPeriodHelper
                 return $this->translatableStringHelper->localize(json_decode((string) $value, true, 512, JSON_THROW_ON_ERROR));
             },
             'acpCreatedBy', 'acpUpdatedBy', 'referrer' => $this->userHelper->getLabel($key, $values, 'export.list.acp.'.$key),
-            'acpParticipantsPersons' => function ($value) {
+
+            'acpParticipantPersons' => $this->labelPersonHelper->getLabelMulti($key, $values, 'export.list.acp.'.$key),
+            'acpParticipantPersonsIds' => function ($value) use ($key): string {
+                if ('_header' === $value) {
+                    return 'export.list.acp.'.$key;
+                }
+
+                if (null === $value || '' === $value) {
+                    return '';
+                }
+
+                $keys = json_decode((string) $value, true, 512, JSON_THROW_ON_ERROR);
+
+                return implode('|', $keys);
             },
             'locationPersonName', 'requestorPerson' => function ($value) use ($key) {
                 if ('_header' === $value) {
@@ -224,6 +241,11 @@ final readonly class ListAccompanyingPeriodHelper
                 ->addSelect(sprintf('%s_t.%s AS %s', $entity, $field, $entity));
         }
 
+        // persons
+        $qb
+            ->addSelect(sprintf('(SELECT AGGREGATE(IDENTITY(participant_persons_n.person)) FROM %s participant_persons_n WHERE participant_persons_n.accompanyingPeriod = acp) AS acpParticipantPersons', AccompanyingPeriodParticipation::class))
+            ->addSelect(sprintf('(SELECT AGGREGATE(IDENTITY(participant_persons_ids.person)) FROM %s participant_persons_ids WHERE participant_persons_ids.accompanyingPeriod = acp) AS acpParticipantPersonsIds', AccompanyingPeriodParticipation::class));
+
         // step at date
         $qb
             ->addSelect('stepHistory.step AS step')
diff --git a/src/Bundle/ChillPersonBundle/translations/messages.fr.yml b/src/Bundle/ChillPersonBundle/translations/messages.fr.yml
index 82c538c69..60dd6b09b 100644
--- a/src/Bundle/ChillPersonBundle/translations/messages.fr.yml
+++ b/src/Bundle/ChillPersonBundle/translations/messages.fr.yml
@@ -1296,6 +1296,8 @@ export:
             socialIssues: Problématiques sociales
             requestorPerson: Demandeur (personne)
             requestorThirdParty: Demandeur (tiers)
+            acpParticipantPersons: Usagers concernés
+            acpParticipantPersonsIds: Usagers concernés (identifiants)
 
         eval:
             List of evaluations: Liste des évaluations