diff --git a/docs/changelog.rst b/docs/changelog.rst
index c49a413c07..57394efb53 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -8,6 +8,7 @@ CHANGELOG
 **Bug fixes**
 
 - Fix OptionalRangeFilter and CustomDateFromToRangeFilter labels translation (fixes #3852)
+- Change label filter intervention contractor and filter null value on project contractor detail view (#3820)
 
 **Documentation**
 
diff --git a/geotrek/maintenance/filters.py b/geotrek/maintenance/filters.py
index 898c398881..672f97ae4f 100644
--- a/geotrek/maintenance/filters.py
+++ b/geotrek/maintenance/filters.py
@@ -177,7 +177,7 @@ class ProjectFilterSet(StructureRelatedFilterSet):
     district = ProjectIntersectionFilterDistrict(label=_('District'), lookup_expr='intersects', required=False)
     area_type = ProjectIntersectionFilterRestrictedAreaType(label=_('Restricted area type'), lookup_expr='intersects', required=False)
     area = ProjectIntersectionFilterRestrictedArea(label=_('Restricted area'), lookup_expr='intersects', required=False)
-    contractors = ModelMultipleChoiceFilter(label=_("Intervention contractors"), queryset=Contractor.objects.all(), method='filter_contractors')
+    contractors = ModelMultipleChoiceFilter(label=_("Contractors"), queryset=Contractor.objects.all(), method='filter_contractors')
 
     class Meta(StructureRelatedFilterSet.Meta):
         model = Project
diff --git a/geotrek/maintenance/models.py b/geotrek/maintenance/models.py
index d93db6eefa..15e67fbd58 100755
--- a/geotrek/maintenance/models.py
+++ b/geotrek/maintenance/models.py
@@ -553,7 +553,7 @@ def interventions_csv_display(self):
     @property
     def intervention_contractors(self):
         return self.interventions.aggregate(
-            intervention_contractors=ArrayAgg('contractors__contractor', distinct=True))['intervention_contractors']
+            intervention_contractors=ArrayAgg('contractors__contractor', distinct=True, filter=Q(contractors__contractor__isnull=False)))['intervention_contractors']
 
     @classproperty
     def intervention_contractors_verbose_name(cls):