There is provided a slider cover of a slide fastener. An upper mounting plate includes: an upper plate to be arranged above an upper blade of a slider and formed with a through-hole penetrating therethrough; and an upper wall protruding downward from the upper plate. A lower mounting plate includes: a lower plate to be arranged below a lower blade of the slider; and a lower wall for surrounding front, right and left sides of an outer periphery of the lower blade and protruding upward from the lower plate. At least one of the upper and lower mounting plates includes a protrusion protruding from an inner peripheral surface of at least corresponding one of the upper and lower walls and configured to come in close contact with a part of an outer peripheral surface of at least corresponding one of the upper and lower blades.