Provided is a clip capable of fixing an EA material firmly regardless of a variation in plate thickness of a member such as a body sheet metal plate. An EA material employing that clip, and its fixing structure are also provided. The clip (20) has a flange (21) arranged at the surface portion of the EA material, a shaft portion (22) projecting from the flange (21) toward the EA material side, an anchor (23) spreading from the tip of the shaft portion (22) and buried in the EA material, a cut (24) provided in the anchor (23), and locking body (30) projecting from the flange (21) to the side opposite to the shaft portion (22). The locking body (30) has a tubular standing body (31) standing from the flange (21), and locking piece (32) stretching sideways from the side face of the standing body (31) and capable of advancing/retracting resiliently in the stretching direction. When the EA material (1) is fixed to the body sheet metal plate (2A) or (2B), the clip (20) is inserted into the hole (4) in the body sheet metal plate (2A) or (2B) and the EA material (1) is applied to the body sheet metal plate (2A) or (2B). The EA material (1) is held on the body sheet metal plate when a most protruding portion (40) passes through the hole (4).