DRIVING MACHINE

In order to provide a driving machine which achieves reciprocating movements of a rack using a simple mechanism and is able to smoothly engage and disengage the rack by reducing the friction during engagement and disengagement of the rack, the driving machine is equipped with: a nose that extends in a prescribed direction; a housing that has the nose; a blade that has an engaging section, is movably guided in the housing in the prescribed direction, and is capable of driving a fastener via the nose; and a transmission mechanism that has an engaging counterpart section for engaging with the engaging section in order to transmit a driving force, wherein the transmission mechanism has a roller mechanism for causing the engaging section and engaging counterpart section to disengage from each other. 为了提供能够通过简单机构来实现齿条的往返运动，且能够减少齿条卡合与脱离时的摩擦而顺利地进行卡合与脱离的打钉机，所述打钉机包括：突伸部，沿着规定方向延伸；壳体，具有所述突伸部；撞针，具有卡合部，以可在所述壳体的所述规定方向上移动的方式受到引导，且可通过所述突伸部打入卡扣；以及传递机构，具有与所述卡合部卡合来传递驱动力的被卡合部，所述传递机构包括滚筒机构，所述滚筒机构对所述卡合部与所述被卡合部的卡合的解除进行引导。