Abstract: A thin eyeglasses case for accommodating an eyeglass assembly. The eyeglass assembly has a body and two temple bars pivotally connected to the body. Two lenses are mounted on the body. The thin eyeglasses case includes a first housing and a second housing. The first housing has a first engaging structure. One side of the second housing is pivotally connected to the first housing to form an accommodating portion for accommodating the body of the eyeglass assembly together with the first housing, while two side openings through which the temple bars are exposed are formed. The other side of the second housing has a second engaging structure, which may engage with or disengage from the first engaging structure.