The hedge trimmer includes a cutter drive gear rotationally driven by a drive source in a body housing, a crank cam provided in the gear and including an eccentric disk, and an upper cutter and a lower cutter slidably facing and contacting relatively. The crank cam causes the upper and lower cutters to reciprocate in relatively opposite directions along the longitudinal direction thereof. The crank cam and the upper and lower cutters are arranged in the upper face side of the gear. The cutter has a frame-shaped engagement portion that meshes with the eccentric disk so that the eccentric disk rotates while slidably contacting the inner peripheral surface of the engagement portion. The reference planes on the cutter side and the crank cam side are formed so that substantially no step is generated between the upper faces of the upper cutter and the eccentric disk.
