diff --git a/autoware_launch/config/localization/ndt_scan_matcher/ndt_scan_matcher.param.yaml b/autoware_launch/config/localization/ndt_scan_matcher/ndt_scan_matcher.param.yaml
index 241892e67b..ec80a0ef79 100644
--- a/autoware_launch/config/localization/ndt_scan_matcher/ndt_scan_matcher.param.yaml
+++ b/autoware_launch/config/localization/ndt_scan_matcher/ndt_scan_matcher.param.yaml
@@ -48,7 +48,7 @@
       # The number of initial random trials in the TPE (Tree-Structured Parzen Estimator).
       # This value should be equal to or less than 'initial_estimate_particles_num' and more than 0.
       # If it is equal to 'initial_estimate_particles_num', the search will be the same as a full random search.
-      n_startup_trials: 20
+      n_startup_trials: 100
 
 
     validation: