小牧峠隧道は富山県砺波市にある廃隧道。 昭和18年3月竣工。延長100m、総幅員6.5m、有効高さ4.5m。 国道156号線・金屋トンネル旧道に位置する。
Komaki Pass Tunnel is a waste tunnel located in Tonami City, Toyama Prefecture. Completion in March 1954. Extension 100 m, total width 6.5 m, effective height 4.5 m. It is located in the old road of Jinya Tunnel, Route 156.