The present invention relates to a multifunctional kitchen sink having a sink bacteria inhibiting function, a sink opening and closing function, a cutting board fixing function, and a cutting board sterilizing function. The inner part of a sink is not exposed to the outside when the sink is not used, and the whole inner part of the sink can be sterilized in an unexposed state of the sink. Accordingly, the multifunctional kitchen sink can maximally inhibit bacterial propagation occurring on the inner and outer parts of the sink, and allows a user to feel that the sink is externally clean as the inner part of the sink is invisible to the naked eye. In the case of using a cutting board, the multifunctional kitchen sink has a cutting board fixing function so the cutting board can be stably used. Furthermore, the multifunctional kitchen sink can perform both a cutting board fixing function and a cutting board sterilizing function. Accordingly, the multifunctional kitchen sink enhances the cleanliness of a cutting board and does not require a separate sterilizer. Therefore, the multifunctional kitchen sink can reduce installation costs and can secure user convenience. The multifunctional kitchen sink comprises: a main body having an accommodating space and an opening and closing door a mounting frame mounted on the upper part of the main body a sink mounted on the mounting frame a guide rail attached to the inner part of a penetrating hole of the mounting frame, and to the rear wall surface of the accommodating space an opening and closing plate arranged to cover the upper end part of the sink a main ultraviolet lamp mounted on the lower side of the opening and closing plate an operation control part controlling the operation of the main ultraviolet lamp a cutting board fixing block attached to the upper side of the mounting frame and an auxiliary ultraviolet lamp applying ultraviolet rays to the upper side of a cutting board.COPYRIGHT KIPO 2016본 발명은 개수대의 세균억제기능과 개폐기능
