An insertion-type hinge assembly, comprising: a first hinge member, including: a mount portion configured to be fixed to a first installation area; a shaft coupled to and separated from the mount portion and disposed in parallel to the mount portion; a connection portion that extends outward from the mount portion, the connection portion having a bent end portion formed at a distal end thereof that is coupled to the shaft; and a second hinge member having a body portion configured to be fixed to a second installation area, wherein the second hinge member receives the shaft therein so as to rotatably couple the first and second hinge members (180, 200), characterized in that the body portion of the second hinge member comprises a partial shaft accommodating part in which a first longitudinal portion of the shaft is received, and in that the second hinge member further comprises a cover configured to be coupled to the body portion, the cover having a partial shaft accommodating part in which a second longitudinal portion of the shaft is received, such that the body portion and the cover fully accommodate the shaft when the body portion and the cover are coupled with the shaft positioned therebetween, wherein round portions are formed at both ends of the shaft, and wherein both ends of the partial shaft accommodating parts (203, 223) of each of the body portion and the cover are rounded to correspond to the shape of the round portions of the ends of the shaft to support the shaft rotatably in a radial direction and in an axial direction. a first hinge member, including: a mount portion configured to be fixed to a first installation area; a shaft coupled to and separated from the mount portion and disposed in parallel to the mount portion; a connection portion that extends outward from the mount portion, the connection portion having a bent end portion formed at a distal end thereof that is coupled to the shaft; and a mount portion configured to be fixed to a first installation area; a shaft coupled to and separated from the mount portion and disposed in parallel to the mount portion; a connection portion that extends outward from the mount portion, the connection portion having a bent end portion formed at a distal end thereof that is coupled to the shaft; and a second hinge member having a body portion configured to be fixed to a second installation area, wherein the second hinge member receives the shaft therein so as to rotatably couple the first and second hinge members (180, 200), characterized in that the body portion of the second hinge member comprises a partial shaft accommodating part in which a first longitudinal portion of the shaft is received, and in that the second hinge member further comprises a cover configured to be coupled to the body portion, the cover having a partial shaft accommodating part in which a second longitudinal portion of the shaft is received, such that the body portion and the cover fully accommodate the shaft when the body portion and the cover are coupled with the shaft positioned therebetween, wherein round portions are formed at both ends of the shaft, and wherein both ends of the partial shaft accommodating parts (203, 223) of each of the body portion and the cover are rounded to correspond to the shape of the round portions of the ends of the shaft to support the shaft rotatably in a radial direction and in an axial direction.