PROBLEM TO BE SOLVED: To provide a rotary type rat trap as a result of considering what kind of a trap is used for trapping a rat, capable of trapping the rat by setting a rotary type box-like bent metal tool on a marketed bucket filled with water or anything filled with water, placing a bait on the trap, and on taking the bait by the rat, releasing a latch (a bar) to rotate a board for falling the rat into water to kill the rat. SOLUTION: This rotary type rat trap is provided by placing a metal tool body 1 whose four sides are bent so as not to be released from the marketed bucket filled with water or anything filled with water, attaching the bait to a rotary board having a shaft 2, fixing it with the latch (the bar) 3, and on taking the bait by the rat, releasing the latch (the bar) 4 to rotate the board for falling the rat into water in the bucket or anything filled with water to kill the rat. COPYRIGHT: (C)2005,JPO&NCIPI