The present invention relates to a check valve for preventing a backflow of a washer liquid for washing a window glass of an automobile, and more specifically, relates to a check valve for preventing a backflow of a washer liquid for washing a window glass of an automobile, which is able to allow a great volume of the washer liquid to be smoothly supplied to the window glass with no decrease in flow speed or flow rate when washing the window glass. According to the present invention, the check valve for preventing a backflow of the washer liquid for washing the window glass of an automobile comprises: a housing (110) which is formed by a flow path (111) which penetrates to allow a flow path inlet (112) to be formed on one side unit and to allow a flow path outlet (113) to be formed on the other side unit and to communicate; a spring (130) inserted into the flow path (111) to be placed in between the flow path inlet (112) and the flow path outlet (113) of the housing (110); a valve guide (150) which has an insertion unit (152), which is inserted into the spring (130) and formed on one side unit, and a bushing (120), wherein an elastic transformation occurs, fixated and engaged with the other side unit; and a cap (140) fixated and engaged with the flow path inlet (112) of the housing (110) with an opening/closing duct (141) formed to penetrate and to be opened/closed by the bushing (120) engaged with the valve guide (150).;COPYRIGHT KIPO 2019
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