diff --git a/tests/test_graphql_api/test_reservation/test_query.py b/tests/test_graphql_api/test_reservation/test_query.py
index 0502732aa..0f2636d95 100644
--- a/tests/test_graphql_api/test_reservation/test_query.py
+++ b/tests/test_graphql_api/test_reservation/test_query.py
@@ -378,3 +378,29 @@ def test_reservation__query__order__all_fields(graphql):
             "expiresInMinutes": 5,
         }
     }
+
+
+def test_reservation__query__reservation_unit_is_archived_but_data_is_still_returned_through_relation(graphql):
+    reservation = ReservationFactory.create(reservation_units__is_archived=True)
+    reservation_unit = reservation.reservation_units.first()
+
+    graphql.login_with_superuser()
+    global_id = to_global_id("ReservationNode", reservation.pk)
+
+    fields = "pk reservationUnits { pk isArchived }"
+    expected_response = {
+        "pk": reservation.pk,
+        "reservationUnits": [{"pk": reservation_unit.pk, "isArchived": True}],
+    }
+
+    # Single
+    query = reservation_query(id=global_id, fields=fields)
+    response = graphql(query)
+    assert response.has_errors is False, response.errors
+    assert response.first_query_object == expected_response
+
+    # All
+    query = reservations_query(fields=fields)
+    response = graphql(query)
+    assert response.has_errors is False, response.errors
+    assert response.node(0) == expected_response
diff --git a/tests/test_graphql_api/test_reservation_unit/test_query_all.py b/tests/test_graphql_api/test_reservation_unit/test_query_all.py
index 8ae06cb2c..a957e51d0 100644
--- a/tests/test_graphql_api/test_reservation_unit/test_query_all.py
+++ b/tests/test_graphql_api/test_reservation_unit/test_query_all.py
@@ -14,6 +14,7 @@ def test_reservation_unit_all__no_pagination_limit(graphql):
     graphene_settings.RELAY_CONNECTION_MAX_LIMIT = 1
 
     ReservationUnitFactory.create_batch(2)
+    ReservationUnitFactory.create(is_archived=True)  # Should not be returned
 
     graphql.login_with_superuser()
     query = reservation_units_all_query(fields="pk nameFi nameEn nameSv")
diff --git a/tilavarauspalvelu/api/graphql/types/reservation_unit/types.py b/tilavarauspalvelu/api/graphql/types/reservation_unit/types.py
index 301443400..c86a2fd58 100644
--- a/tilavarauspalvelu/api/graphql/types/reservation_unit/types.py
+++ b/tilavarauspalvelu/api/graphql/types/reservation_unit/types.py
@@ -179,7 +179,10 @@ class Meta:
 
     @classmethod
     def filter_queryset(cls, queryset: models.QuerySet, info: GQLInfo) -> models.QuerySet:
-        # Always hide archived reservation units
+        # Allow fetching data for archived reservation units, through relations from ReservationNode
+        if getattr(info.return_type, "name", None) in ["ReservationNode", "ReservationNodeConnection"]:
+            return queryset
+        # Archived reservation units should not be directly visible in the API
         return queryset.filter(is_archived=False)
 
     def resolve_is_closed(root: ReservationUnit, info: GQLInfo) -> bool: