A cooking appliance, comprising: a housing having a cooking space defined by a bottom surface, two lateral surfaces (120, 130) and a rear surface of the housing, the housing having an open upper surface and an open front surface; a door for opening and closing the open upper surface and the open front surface of the housing; a hinge part swivably coupling the door at a rear portion of the housing; a hinge coupling part coupled to the door and coupled to the hinge part; and a fastening part (2010, 2015) coupling the hinge part to the hinge coupling part, wherein the door comprises: a door upper surface part for opening and closing the open upper surface of the housing; a door front surface part for opening and closing the open front surface of the housing; and a door frame, the hinge coupling part being provided on the door frame and/or being part of the door frame, characterized in that, the hinge coupling part has a position adjustment guide part (2323, 2324) configured to guide a coupling position between the fastening part and the hinge coupling part, wherein the fastening part (2010, 2015) comprises a bolt member and a nut member coupled to the bolt member, wherein the position adjustment guide part (2323, 2324) comprises a fastening and guiding groove recessed in the hinge coupling part, and at least a portion of the fastening part (2010, 2015) is accommodated in the fastening and guiding groove, wherein the fastening and guiding groove and the nut member are disposed in a space between the door upper surface part and the door frame, and the bolt member passes through the hinge part and the hinge coupling part and is coupled to the nut member, and wherein depending on a front-to-rear position of the fastening part (2010, 2015) being coupled to the position adjustment guide part (2323, 2324), a gap between the housing and the door in the front-to-rear direction is adjusted. a housing having a cooking space defined by a bottom surface, two lateral surfaces (120, 130) and a rear surface of the housing, the housing having an open upper surface and an open front surface; a door for opening and closing the open upper surface and the open front surface of the housing; a hinge part swivably coupling the door at a rear portion of the housing; a hinge coupling part coupled to the door and coupled to the hinge part; and a fastening part (2010, 2015) coupling the hinge part to the hinge coupling part, wherein the door comprises: a door upper surface part for opening and closing the open upper surface of the housing; a door front surface part for opening and closing the open front surface of the housing; and a door frame, the hinge coupling part being provided on the door frame and/or being part of the door frame, characterized in that, the hinge coupling part has a position adjustment guide part (2323, 2324) configured to guide a coupling position between the fastening part and the hinge coupling part, wherein the fastening part (2010, 2015) comprises a bolt member and a nut member coupled to the bolt member, wherein the position adjustment guide part (2323, 2324) comprises a fastening and guiding groove recessed in the hinge coupling part, and at least a portion of the fastening part (2010, 2015) is accommodated in the fastening and guiding groove, wherein the fastening and guiding groove and the nut member are disposed in a space between the door upper surface part and the door frame, and the bolt member passes through the hinge part and the hinge coupling part and is coupled to the nut member, and wherein depending on a front-to-rear position of the fastening part (2010, 2015) being coupled to the position adjustment guide part (2323, 2324), a gap between the housing and the door in the front-to-rear direction is adjusted. a door upper surface part for opening and closing the open upper surface of the housing; a door front surface part for opening and closing the open front surface of the housing; and a door frame, the hinge coupling part being provided on the door frame and/or being part of the door frame, characterized in that, the hinge coupling part has a position adjustment guide part (2323, 2324) configured to guide a coupling position between the fastening part and the hinge coupling part, wherein the fastening part (2010, 2015) comprises a bolt member and a nut member coupled to the bolt member, wherein the position adjustment guide part (2323, 2324) comprises a fastening and guiding groove recessed in the hinge coupling part, and at least a portion of the fastening part (2010, 2015) is accommodated in the fastening and guiding groove, wherein the fastening and guiding groove and the nut member are disposed in a space between the door upper surface part and the door frame, and the bolt member passes through the hinge part and the hinge coupling part and is coupled to the nut member, and wherein depending on a front-to-rear position of the fastening part (2010, 2015) being coupled to the position adjustment guide part (2323, 2324), a gap between the housing and the door in the front-to-rear direction is adjusted.