A reciprocating tool comprising: a motor configured to rotate around a first rotating shaft; an outer frame that accommodates the motor; a base that is provided at a lower part of the outer frame; a rotating part configured to be rotary driven by the motor around a second rotating shaft, the rotating part including, a gear that is provided on the second rotating shaft, and a pin that is provided at an eccentric position of the gear; a plunger that engages with the pin and is configured to reciprocate in a vertical direction, on a reciprocation axis, in accordance with a vertical movement of the pin; and a curved part that is provided to the plunger, extends in a direction intersecting a reciprocating direction of the plunger and engages with the pin.