PROBLEM TO BE SOLVED: To provide a cleansing agent that has excellent foaming power and foam quality, has easy rinsability at cleansing, has no stickiness after cleansing, gives a moist feel, and has the effect to retain moisture content of the skin after cleansing.SOLUTION: The cleansing agent has component (A): ionic surfactant, and component (B): phytosterol ester obtained by the esterification of phytosterol and at least one selected from a fatty acid group.SELECTED DRAWING: None