A golf bag cart includes a bag (1) having an inner empty space for receiving a plurality of golf clubs, a wide lateral surface, and a narrow bottom surface (2). A cart support (3) is longitudinally fixed to the lateral surface of the bag (1) via upper (17) and lower brackets (19). A pressurizing member (5) is fixed to the bag (1) while positioning just below the cart support such that the pressurizing member (5) is rotated by a predetermined angle. The pressurizing member (5) is pressurized against the earth and endures the weight of the bag when the bag is inclined by a predetermined angle. A plurality of left and right leg members (9) are movably fixed to a middle portion of the cart support (3) via a fixture (7) such that the leg members (9) are arranged to form a predetermined angle with respect to the fixture (7). The fixture (7) is rigidly fixed to the cart support (3). The leg members (9) are folded by way of self weight when the bag (1) is erected. Wheel members (11) are fixed to free ends of the left and right leg members (9) via brackets (29) such that the wheel members are rotated. The wheel members (11) are folded by way of self weight together with the left and right leg members (9) when the bag (1) is erected. A plurality of link members (13) each have an end coupled to the pressurizing member (5), and an opposite end coupled to the leg members (9). The link members (13) unfold the leg members (9) while being elevated when the pressurizing member (5) is pressurized against the earth.