The present invention relates to a light amount-adjustable illumination apparatus for inducing synthesis of vitamin D in the body, configured to determine whether a user is an adult or a child by measuring a height of the user and irradiate a predetermined amount of light from an ultraviolet lamp, thereby preventing any side effects occurring by an excessive amount of ultraviolet rays. According to the present invention, the light amount-adjustable illumination apparatus for inducing synthesis of vitamin D in the body comprises: a lighting device main body installed on an interior ceiling, wherein a socket for a lighting lamp and a socket for an ultraviolet lamp connected with external power to supply power are formed on a lower portion, respectively； the lighting lamp detachably coupled to the socket for a lighting lamp of the lighting device main body； the ultraviolet lamp detachably coupled to the socket for an ultraviolet lamp of the lighting device main body and configured to emit ultraviolet rays to induce synthesis of vitamin D in the body when being turned on； a control unit operably mounted on one side of the lighting device main body, electrically connected with the socket for an ultraviolet lamp, and configured to control a light amount of the ultraviolet lamp； a sensor operably mounted on the other side of the lighting device main body, electrically connected with the control unit, and configured to determine whether a user located below the lighting device main body is an adult or a child and to allow the light amount of the ultraviolet lamp to be controlled by the control unit, according to the determined result； and a controller mounted on one interior wall surface, electrically connected with the control unit, and configured to allow manual control of flickering of the lighting lamp and the ultraviolet lamp, and the light amount of the ultraviolet lamp.COPYRIGHT KIPO 2020개시된 내용은 키 측정에 따라 성인인지 어린이인지가 판별되고 이에 따라 미리 설정된 광량으로 자외선램프가 조사됨에 따라 과도한 자외선에 의해 부
