A washing agent pump, comprising: a passage forming member forming a passage of a liquid washing agent, and provided with an intake valve opening and closing an inlet port of a pressing space, and a discharge valve opening and closing an outlet port of the pressing space; a cylinder disposed at one side of the passage forming member to communicate with the pressing space; a piston disposed within the cylinder in a reciprocating manner; a piston operating unit configured to operate the piston to reciprocate; and an introduction end portion protruding from a front portion of the passage forming member and extending from the inlet port of the pressing space; characterized in that the washing agent pump further comprises: an introduction hole opening/closing member disposed to surround the introduction end portion and configured to open and close an introduction hole formed through one side of the introduction end portion; and an introduction hole opening/closing member spring configured to apply elastic force to the introduction hole opening/closing member, wherein the introduction hole opening/closing member is movable to open the introduction hole when the introduction end portion is coupled to a storage container for storing a washing agent, and to close the introduction hole by the introduction hole opening/closing member spring when the introduction end portion is separated from the storage container. a passage forming member forming a passage of a liquid washing agent, and provided with an intake valve opening and closing an inlet port of a pressing space, and a discharge valve opening and closing an outlet port of the pressing space; a cylinder disposed at one side of the passage forming member to communicate with the pressing space; a piston disposed within the cylinder in a reciprocating manner; a piston operating unit configured to operate the piston to reciprocate; and an introduction end portion protruding from a front portion of the passage forming member and extending from the inlet port of the pressing space; characterized in that the washing agent pump further comprises: an introduction hole opening/closing member disposed to surround the introduction end portion and configured to open and close an introduction hole formed through one side of the introduction end portion; and an introduction hole opening/closing member spring configured to apply elastic force to the introduction hole opening/closing member, wherein the introduction hole opening/closing member is movable to open the introduction hole when the introduction end portion is coupled to a storage container for storing a washing agent, and to close the introduction hole by the introduction hole opening/closing member spring when the introduction end portion is separated from the storage container. an introduction hole opening/closing member disposed to surround the introduction end portion and configured to open and close an introduction hole formed through one side of the introduction end portion; and an introduction hole opening/closing member spring configured to apply elastic force to the introduction hole opening/closing member, wherein the introduction hole opening/closing member is movable to open the introduction hole when the introduction end portion is coupled to a storage container for storing a washing agent, and to close the introduction hole by the introduction hole opening/closing member spring when the introduction end portion is separated from the storage container.