The most common anatomic location of calcific tendinitis is the suprasupinatus muscle of the shoulder joint. However, it is known to develop in any joint including the hip, knee, wrist, and elbow. Around the hip joint, it occurs usually in areas such as the gluteus maximus tendon, the gluteus medius tendon, and the bursa between the gluteus medius and the greater trochanter. The occurrence of calcific tendinitis in the rectus femoris is very rare. We hereby report three cases of calcific tendinitis, which developed in the rectus femoris.