To provide a working vehicle for a slope face devised to be capable of carrying out work safely by preventing overturning by devising it to be capable of smoothly travelling on a slope and certainly fixing the working vehicle on a slope frame or the slope in the case of making a drilling device usable.

A working vehicle main body 1 capable of travelling on a slope frame of a slope is furnished with a suspender 11 installed free to support in a suspended state from an upper part of the slope and a drilling device 21 installed through a revolving mechanism 17 to be stored to be in a horizontal state roughly with a car body 4 at the time when it is not used and to be revolved to be in an erected state at the time when it is used on an upper part of the car body 4 of the working car main body 1. Additionally, it is constituted of a working car body lock device to fix the working vehicle main body 1 on the slope frame in the case of making this drilling device 21 in a used state.