To provide a handy crusher having an excellent crushing function.

A cylinder 1 is provided with front and rear cylinder chambers 3, 4 arranged in series to communicate each other through a communicating passage 8 provided in a piston rod 7. The front end of the piston rod 7 mounted in the cylinder through a partition wall 2 between the cylinder chambers is provided with a front piston 5 on the front cylinder chamber 3 side, and the rear end is provided with a rear piston 6 on the rear cylinder chamber 4 side. The other one end of a driving piece 15, one end of which is mounted to the front piston 5, led out of the cylinder 1 is made turnable to a pair of blade bodies 13, 13A. The rear cylinder chamber 4 is provided with operating fluid in-and-out ports 17, 18 in front and in the rear through the rear piston 6.