shielded and a second position where the shielding quantity becomes less than that of the first position see e g fig4 the first position is a low beam position where a short distance is irradiated and the light quantity control portion 27 of the movable shade 22 is in a substantially vertical state the second position is a high beam position where a long distance is irradiated and the light quantity control portion 27 of the movable shade 22 is in a tilted state the support plate 23 includes a base surface portion 30 facing the up and down direction shaft support protrusions 31 31 protruding upward from the left and right ends of the base surface portion 30 respectively and a stopper protrusion 32 protruding from the rear end of the base surface portion 30 upward see e g fig2 a spring hook portion 30 a protruding forward and slanting upward is provided at the front end of the base surface portion 30 the base surface portion 30 is formed with a shaft insertion hole 30 b at one end in the left and right direction thereof the axial direction of the rotation shaft 24 corresponds to the left and right direction and the axial opposite ends of the rotation shaft 24 are inserted through the movable shade 22 in the vicinity of the left and right ends of the movable shade 22 the axial opposite ends of the rotation shaft 24 are positioned at lateral sides outsides of the light quantity control portion 27 and the portion other than the opposite ends of the rotation shafts is positioned in front of the light quantity control portion 27 fixation rivets 33 33 and fixation rings 34 34 are fixed to the axial opposite ends of the rotation shaft.