A crane including a cabin provided on the left or right side, a boom raised and lowered around a pair of boom feet provided on the left and right sides of the base of the boom, and a gantry provided behind the boom. The boom foot on the side of the cabin is located in a position determined by the width of the crane and the width of the cabin. The center line of the boom is located on the opposite side of the center line of the gantry from the cabin so that the distance between the boom foot on the opposite side from the cabin and the center line of the gantry is greater than the distance between the boom foot on the side of the cabin and the center line of the gantry.