Locking device for opening/closing body

A locking device for an opening and closing body that is openably and closably attached to an opening portion of a fixed body, the locking device comprising:

• a lock portion provided on one of the fixed body or the opening and closing body;
• a rod disposed on an other member of the fixed body or the opening and closing body and configured to slide via an operation member to engage with and disengage from the lock portion;
• and
• a protrusion protruding from the other member of the fixed body or the opening and closing body, wherein
• the rod has a recess surrounded by a pair of first walls disposed to face each other in a sliding direction of the rod and a pair of second walls disposed to face each other in a direction orthogonal to the sliding direction,
• the protrusion is disposed inside the recess or inside and outside the recess, and is provided with a flange portion provided on a tip end side in a protruding direction of the protrusion,
• the rod has a first elastic piece that extends from one of the pair of first walls toward an other of the pair of first walls and applies an elastic force by being elastically abutted against a tip end surface of the protrusion in the protruding direction, and a pair of second elastic pieces that extend from an inner surface or an outer surface of the pair of second walls,
• each of the second elastic pieces has a receiving surface that engages with a back surface of the flange portion, and is configured to elastically abut against a side surface of the protrusion;
• and
• the rod is configured to move with respect to the protrusion in the sliding direction.