The present invention relates to a light irradiation device for vagina, which is inserted into a female genital organ to emit light, thereby helping treat a variety of female diseases. The light irradiation device of the present invention comprises: a light emitting member (100) emitting light； a protection cover (200) covering and protecting the light emitting member (100) to prevent the light emitting member (100) from being contaminated during the use when inserted into the inside of vagina of a human body while surrounding the light emitting member (100) and penetrated by light of the light emitting member (100)； and a controller (400) controlling the light emitting member (100). The light emitting member (100) includes: a light source body (110) receiving electric power from the outside； a circuit board (120) electrically connected and fixed to the light source body (110)； a light source (130) mounted on the circuit board (120) to emit light by the received electric power； and a light source cover (140) penetrated by the light of the light source (130) to cover the circuit board (120) while joined to the light source body (110). The protection cover (200) is formed in a shape of a cap in order to make the light source cover (140) of the light emitting member (100) inserted into the inner space, and has a hook portion (210) formed on the circumference of an entrance into which the light source cover (140) is inserted to be hooked to the outer side of vagina.본 발명은 여성의 생식기에 삽입된 상태로 빛을 발산하여 각종 여성질환의 치료에 도움을 줄 수 있는 질을 위한 광조사장치에 관한 것이다. 본 발명의 특징은, 빛을 발산하는 광발산부재(100)와, 광발산부재(100)를 감싸면서 인체의 질 내부에 삽입된 상태로 광발산부재(100)의 빛이 투과되면서 사용하는 과정에서 광발산부재(100)의 오염을 방지하도록 보호하는 보호커버(200)와, 광발산부재(100)를 컨트롤하기 위한 컨트롤러(400)를 포함하며, 광발산부재(100)는 외부로부터 전원이 입력되는 광원몸체(110)와, 광원몸체(110)에 전기적으로 연결된 상태로 고정되는 회로기판(120)과, 회로기판(120)에 탑재되어 입력되는 전원에 의해 빛을 발산하는 광원(130)과, 광원(130)의 빛이 투과되고 광원몸체(110)에 결합된 상태로 회로기판(120)을 커버하는 광원커버(140)를 포함하고, 보호커버(200)는 광발산부재(100)의 광원커버(140)가 내부공간으로 삽입되도록 캡형태로 형성되고, 광원커버(140)
