A component feeder for feeding components to a component feeding position using a component feeding tape including a carrier tape holding the components at equal intervals and a covering tape attached to the upper surface of the carrier tape. The component feeder includes a driving sprocket and a tape guide. The driving sprocket is configured to feed the component feeding tape to the component feeding portions. The tape guide includes a pressing surface to press an upper surface of the component feeding tape fed to the component feeding position. The tape guide includes a component exposing portion and an adjustment portion. The component exposing portion includes an inserting portion to be inserted between the carrier tape and the covering tape. The adjustment portion is configured to adjust a projection amount of the inserting portion from the pressing surface.