A component feeding device includes a component exposing unit and a tape traveling guide unit. The component exposing unit lifts a cover tape of a component storage tape, and pushes a lifted part of the cover tape outward while folding the lifted part downward. The tape traveling guide unit guides the component storage tape to help it in traveling. The tape traveling guide unit includes a guide body and opening width defining members fitted to the guide body. The guide body has an opening serving as an opening for taking out a component, and a cover tape path demarcating portion that demarcates a path through a lifted part of the cover tape passes. Each of the opening width defining members defines the opening width of the opening, and applies a downward pressure to a first specific area of an upper surface of the carrier tape.