Front loader and work vehicle equipped with the same

A front loader comprising:

• a pair of left and right masts provided to a machine body frame in a detachable manner;
• a pair of left and right lifting arms coupled to the masts in a vertically rotatable manner;
• and
• a work equipment mounted to the pair of left and right lifting arms, wherein
• each of the lifting arms includes a rear lifting arm attached to one of the masts and a front lifting arm attached to the work equipment, the front lifting arm having an insertion portion to be inserted into the rear lifting arm,
• the rear lifting arm has a side plate whose front end portion is provided with a protruding portion that extends along a side plate of the front lifting arm, and an upper edge of the protruding portion extends along the side plate of the front lifting arm farther than a lower edge of the protruding portion, and
• under a state where the front lifting arm is inserted into the rear lifting arm, an overlap portion where the insertion portion overlaps the protruding portion is welded so that the front lifting arm is fixed to the rear lifting arm.