To provide a golf bag capable of freely changing the size of a storage top opening divided by partition parts according to the kind and number of golf clubs to be stored inside the bag.

This golf bag has a partition member in the opening of a bag body, consisting of a vertical side partition body and a lateral side partition body for dividing the opening into a plurality of storage holes. The golf bag also has a position change allowing means for changing the attaching position of the lateral side partition body relatively to the bag body. The size of the storage holes can be arbitrarily changed by changing the attaching position of the lateral side partition body by the position change allowing means.