Abstract: A lacrosse stick head fastening system is disclosed that prevents loosening of a lacrosse stick head from a lacrosse stick shaft. The lacrosse stick head fastening system generally includes a fastener body that is located in a head fastening end of a lacrosse stick shaft. A transverse fastener extends transversely through a shaft fastening end of the lacrosse stick head, through the head fastening end of the shaft, and through the fastener body. A longitudinal fastener extends longitudinally through the head and into the fastener body. The transverse fastening device secures the shaft fastening end of the head at both sides, and the longitudinal fastening device applies a force longitudinally to maintain the transverse fastening device in side shear stress, thereby preventing both fastening devices from becoming loose during play. Thus, the lacrosse stick head is held onto the shaft with at least three points of contact as opposed to one.