Abstract: A laser pointer includes a first metal barrel having a first end closed with a metal screw cap, and a second end, which is opened, the first metal barrel holding a battery set, a control circuit board, an axially extended spring member and a laser diode supported on the axially extended spring member and extended out of the second end of the first metal barrel; a second metal barrel having a first end opened and coupled to the second end of the first metal barrel by a screw joint, and a second end opened, the second metal barrel being moved axially relative to the first metal barrel upon a rotary motion; and a socket mounted in the first end of the second metal barrel and moved with the second metal barrel axially between a first position where the socket is coupled to the laser diode to compress the axially extended spring member and hold the laser diode in position, and a second position where the socket is released from the laser diode, enabling the laser diode to be oscillated with the axially extended sp