To provide a drawer of a circuit breaker, consisting of a breaker body and a mount, configured so that its width becomes as small as possible.

A pin 6 is attached to the surface of the power supply side and to the load side of a plug-in type breaker body 50, and there are attached drawer units 18, 19 having a rotating table 5 on which there are formed a linear groove 24 and a spiral groove 25, into which the pin 6 of the plug-in type breaker body 50 is fitted to the power supply side and the load side of a mount 10, as well as, having a guide means composed of a guide groove 7 at the breaker body side and a guide pillar 26 provided on the drawer unit side. When the rotating table 5 rotates, the pin 6 is energized via the edge of the spiral groove 24, and the breaker body is inserted and pulled by the action of the guide means, caused by the energizing force.