A golf club bag includes a bag body, a main support rod, a linking rod and a base. The bag body is fixed to the base composed of a front base and a rear base, which have substantially the same width and are pivotally connected to each other. When the bag body is placed slantingly, the front base may serve as a main supporting member at a bottom portion thereof, the larger supporting surface area can be obtained, and the stability of placement can be enhanced. In addition, peripheries of the front base and the rear base are connected to the bag body, a bottom end of the linking rod is inserted into the bag body and pivotally connected to the front base. Thus, it is possible to prevent its pivotal connection portion from being exposed outside the bag body and from being collided and damaged.