To provide a telescopic boom type crane capable of realizing a large rising and falling angle of an telescopic boom even in a crawler belt contracted condition and reducing height of a roller support member supporting a rope support roller provided on a rear face.

This telescopic boom type crane 1 is constituted in such a way that it is provided with a lower part running body 2 of crawler running type having a freely expansible crawler and a main winding winch 11, an auxiliary winding winch 13, and a third winch 18 above the lower part running body 2 and an upper part swivel body 4 provided with the telescopic boom 7 capable of rising, falling, extending, and contracting freely is mounted. The main winding winch 11 and the auxiliary winding winch 13 are arranged behind the center of turn of the upper part swivel body 4, and the third winch is detachably arranged in front of the center of turn of the upper part swivel body.