本巢市（日语：本巣市／もとすし）为日本岐阜县西南部的市。东西17km，南北43km，总面积374.57km²。

本巣市北侧与福井县相邻。

• 山：桑山
• 河川：根尾川

Motosu(本巣市,Motosu-shi) is a city in the south west of Gifu Prefecture, Japan.

As of July 2011, the city has an estimated population of 34,997 and a population density of 93 persons per km. The total area is 374.57 km.