To provide a function that can lengthen work efficient length even if the erection height of a leader is reduced, and to effectively drive piles.

In a driving device support 10 that is provided at the top part of a leader 3 that is supported by a support member and erected in base machine, a support arm 11 projecting to the front is bifurcated, a working machine driving device (an auger driving device 4) that is vertically guided by a guide rail 3a of the leader 3 is made to enter a space formed between the support arms 11 and 11, and a sling 7 that is operated by a winding machine that is mounted to the base machine by moving around sheaves 13 to 19 that are provided in the driving device support 10 is wound and hooked to sheaves 8 and 8' for hanging that are provided at both the side parts of the working driving device 4 for elevating the working driving device 4.