A mouse having a scanning function, comprising: a case including: a base having a scan window; and a cover coupled to the base; and a scanner received within the case and mounted on the base, at a position corresponding to the scan window, wherein the scanner comprises: a housing; a glass module coupled to a lower portion of the housing, the glassmodule being configured to be coupled to the scan window; a mirror module provided at a first end of an upper portion of the housing, wherein the mirror module is configured to reflect a scan image received from the glass module; and a camera module provided at a second end of the upper portion of the housing, the first end being opposite of the second end at which the mirror module is provided, wherein the camera module is configured to capture an image reflected by the mirror module, characterized in that the scanner further comprises: a lighting module installed at the upper portion of the housing, spaced apart from the camera module; and a barrier (26, 27) provided at an inner surface of the upper portion of the housing, at a position corresponding to an emitting side of the lighting module, wherein the barrier (26, 27) extends downward from the inner surface of the upper portion of the housing into the inside of the housing to block light reflected from an inside of the housing from being reflected onto the camera module. a case including: a base having a scan window; and a cover coupled to the base; and a base having a scan window; and a cover coupled to the base; and a scanner received within the case and mounted on the base, at a position corresponding to the scan window, wherein the scanner comprises: a housing; a glass module coupled to a lower portion of the housing, the glassmodule being configured to be coupled to the scan window; a mirror module provided at a first end of an upper portion of the housing, wherein the mirror module is configured to reflect a scan image received from the glass module; and a camera module provided at a second end of the upper portion of the housing, the first end being opposite of the second end at which the mirror module is provided, wherein the camera module is configured to capture an image reflected by the mirror module, a housing; a glass module coupled to a lower portion of the housing, the glassmodule being configured to be coupled to the scan window; a mirror module provided at a first end of an upper portion of the housing, wherein the mirror module is configured to reflect a scan image received from the glass module; and a camera module provided at a second end of the upper portion of the housing, the first end being opposite of the second end at which the mirror module is provided, wherein the camera module is configured to capture an image reflected by the mirror module, characterized in that the scanner further comprises: a lighting module installed at the upper portion of the housing, spaced apart from the camera module; and a barrier (26, 27) provided at an inner surface of the upper portion of the housing, at a position corresponding to an emitting side of the lighting module, a lighting module installed at the upper portion of the housing, spaced apart from the camera module; and a barrier (26, 27) provided at an inner surface of the upper portion of the housing, at a position corresponding to an emitting side of the lighting module, wherein the barrier (26, 27) extends downward from the inner surface of the upper portion of the housing into the inside of the housing to block light reflected from an inside of the housing from being reflected onto the camera module.