diff --git a/planning/autoware_path_generator/config/path_generator.param.yaml b/planning/autoware_path_generator/config/path_generator.param.yaml
index 1a8d2c6c57..b6ed2383e3 100644
--- a/planning/autoware_path_generator/config/path_generator.param.yaml
+++ b/planning/autoware_path_generator/config/path_generator.param.yaml
@@ -1,7 +1,9 @@
 /**:
   ros__parameters:
     planning_hz: 10.0
-    backward_path_length: 5.0
-    forward_path_length: 300.0
-    waypoint_group_separation_threshold: 1.0
-    waypoint_group_interval_margin_ratio: 10.0
+    path_length:
+      backward: 5.0
+      forward: 300.0
+    waypoint_group:
+      separation_threshold: 1.0
+      interval_margin_ratio: 10.0
diff --git a/planning/autoware_path_generator/param/path_generator_parameters.yaml b/planning/autoware_path_generator/param/path_generator_parameters.yaml
index 8d9f77a777..2c7192427b 100644
--- a/planning/autoware_path_generator/param/path_generator_parameters.yaml
+++ b/planning/autoware_path_generator/param/path_generator_parameters.yaml
@@ -2,14 +2,16 @@ path_generator:
   planning_hz:
     type: double
 
-  backward_path_length:
-    type: double
+  path_length:
+    backward:
+      type: double
 
-  forward_path_length:
-    type: double
+    forward:
+      type: double
 
-  waypoint_group_separation_threshold:
-    type: double
+  waypoint_group:
+    separation_threshold:
+      type: double
 
-  waypoint_group_interval_margin_ratio:
-    type: double
+    interval_margin_ratio:
+      type: double
diff --git a/planning/autoware_path_generator/src/node.cpp b/planning/autoware_path_generator/src/node.cpp
index 11b2a3764e..18eff123d6 100644
--- a/planning/autoware_path_generator/src/node.cpp
+++ b/planning/autoware_path_generator/src/node.cpp
@@ -208,8 +208,8 @@ std::optional<PathWithLaneId> PathGenerator::generate_path(
   }
 
   const auto lanelets = utils::get_lanelets_within_route(
-    current_lane, planner_data_, current_pose, params.backward_path_length,
-    params.forward_path_length);
+    current_lane, planner_data_, current_pose, params.path_length.backward,
+    params.path_length.forward);
   if (!lanelets) {
     return std::nullopt;
   }
@@ -229,9 +229,9 @@ std::optional<PathWithLaneId> PathGenerator::generate_path(
 
   const auto arc_coordinates = lanelet::utils::getArcCoordinates(lanelets, current_pose);
   const auto s = arc_coordinates.length;  // s denotes longitudinal position in Frenet coordinates
-  const auto s_start = std::max(0., s - params.backward_path_length);
+  const auto s_start = std::max(0., s - params.path_length.backward);
   const auto s_end = [&]() {
-    auto s_end = s + params.forward_path_length;
+    auto s_end = s + params.path_length.forward;
 
     if (!utils::get_next_lanelet_within_route(lanelets.back(), planner_data_)) {
       s_end = std::min(s_end, lanelet::utils::getLaneletLength2d(lanelets));
@@ -268,8 +268,8 @@ std::optional<PathWithLaneId> PathGenerator::generate_path(
   };
 
   const auto waypoint_groups = utils::get_waypoint_groups(
-    lanelet_sequence, *planner_data_.lanelet_map_ptr, params.waypoint_group_separation_threshold,
-    params.waypoint_group_interval_margin_ratio);
+    lanelet_sequence, *planner_data_.lanelet_map_ptr, params.waypoint_group.separation_threshold,
+    params.waypoint_group.interval_margin_ratio);
 
   auto extended_lanelets = lanelet_sequence.lanelets();
   auto s_offset = 0.;