A feeder comprising: a feeder main body, on a rear section of which is formed a tape insertion section for inserting a carrier tape that stores multiple components, and on a front section of which is formed a tape discharge section for discharging the carrier tape from which the components have been removed; a tape feeding path for feeding the carrier tape from rear to front, the tape feeding path being provided on the feeder main body so as to connect to the tape insertion section; a rear-side sprocket (63, 64) rotatably provided on the feeder main body and including an engaging protrusion (63a, 64a) capable of engaging engaging holes of the carrier tape inserted into the tape insertion section, the rear-side sprocket (63, 64) being configured to feed the carrier tape along the tape feeding path; a front-side sprocket (61, 62) rotatably provided on the feeder main body and including an engaging protrusion (61a, 62a) capable of engaging engaging holes of the carrier tape fed by the rear-side sprocket (63, 64), the front-side sprocket (61, 62) being configured to feed the carrier tape to the tape discharge section; and a cover member provided on the feeder main body in an openable and closable manner so as to cover the tape feeding path between the rear-side sprocket (63, 64) and the front-side sprocket (61, 62), the feeder is characterized in that: an upper surface retaining member configured to press on an upper surface of the carrier tape being fed on the tape feeding path covered by the cover member is provided on the feeder main body, and a retainer biasing member configured to bias the upper surface retaining member downwards is provided on the cover member. a feeder main body, on a rear section of which is formed a tape insertion section for inserting a carrier tape that stores multiple components, and on a front section of which is formed a tape discharge section for discharging the carrier tape from which the components have been removed; a tape feeding path for feeding the carrier tape from rear to front, the tape feeding path being provided on the feeder main body so as to connect to the tape insertion section; a rear-side sprocket (63, 64) rotatably provided on the feeder main body and including an engaging protrusion (63a, 64a) capable of engaging engaging holes of the carrier tape inserted into the tape insertion section, the rear-side sprocket (63, 64) being configured to feed the carrier tape along the tape feeding path; a front-side sprocket (61, 62) rotatably provided on the feeder main body and including an engaging protrusion (61a, 62a) capable of engaging engaging holes of the carrier tape fed by the rear-side sprocket (63, 64), the front-side sprocket (61, 62) being configured to feed the carrier tape to the tape discharge section; and a cover member provided on the feeder main body in an openable and closable manner so as to cover the tape feeding path between the rear-side sprocket (63, 64) and the front-side sprocket (61, 62), the feeder is characterized in that: an upper surface retaining member configured to press on an upper surface of the carrier tape being fed on the tape feeding path covered by the cover member is provided on the feeder main body, and a retainer biasing member configured to bias the upper surface retaining member downwards is provided on the cover member. an upper surface retaining member configured to press on an upper surface of the carrier tape being fed on the tape feeding path covered by the cover member is provided on the feeder main body, and a retainer biasing member configured to bias the upper surface retaining member downwards is provided on the cover member.