<p>A wheel loader comprises a bucket boom (10) formed of a pair of right and left side members (11), a front frame (3) to which the base ends of the paired side members (11) are connected, and a boom cylinder the base end of which is connected to the front frame (3) and the tip end of which is connected to the side members. The interval W1 of the pair of side members (11) on the base end side is smaller than the interval W2 on the tip end side. A planar part (29) gradually tilted to the center in the lateral direction toward the upper side is formed on each of the right and left outermost parts of the front frame (3). A mounting boss (3A) to which the base end of the boom cylinder is attached is formed on the lower side of the planar part (29). A mounting boss (3B) to which the base end of the side member (11) is attached is formed on the upper side of the planar part (29).</p>