A feeder comprising: a feeder main body which has a tape insertion section formed in a rear portion of the feeder main body, the tape insertion section being configured to receive an embossed carrier tape in which a component storage section (901 c, 901d) storing a plurality of components is formed so as to protrude downward from a base tape and a carrier tape in which a component storage section not protruding downward is formed and the bottom of the tape is formed so as to be flat; a tape conveyance path which is provided between both side walls (21ba, 21bb) of the feeder main body so as to communicate with the tape insertion section in order to convey the carrier tapes toward a front side from a back side; and a rear side sprocket, which is rotatably provided in the feeder main body, has an engageable engagement protrusion for engaging an engagement hole of the carrier tape inserted from the tape insertion section, and transmitting the carrier tape along the tape conveyance path, wherein a groove for allowing passing of the component storage section (901c, 901d) during the conveyance of the carrier tape having the component storage section protruding is formed in the tape conveyance path, and wherein the groove is provided with a tape lower face biasing member which is configured to be pressed by a lower face of the carrier tape and is configured to be deformed downward when the carrier tape has the component storage section protruding, and which is configured to bias the lower face of the carrier tape when the carrier tape has the component storage section not protruding, until the carrier tape inserted from the tape insertion section reaches the rear side sprocket. a feeder main body which has a tape insertion section formed in a rear portion of the feeder main body, the tape insertion section being configured to receive an embossed carrier tape in which a component storage section (901 c, 901d) storing a plurality of components is formed so as to protrude downward from a base tape and a carrier tape in which a component storage section not protruding downward is formed and the bottom of the tape is formed so as to be flat; a tape conveyance path which is provided between both side walls (21ba, 21bb) of the feeder main body so as to communicate with the tape insertion section in order to convey the carrier tapes toward a front side from a back side; and a rear side sprocket, which is rotatably provided in the feeder main body, has an engageable engagement protrusion for engaging an engagement hole of the carrier tape inserted from the tape insertion section, and transmitting the carrier tape along the tape conveyance path, wherein a groove for allowing passing of the component storage section (901c, 901d) during the conveyance of the carrier tape having the component storage section protruding is formed in the tape conveyance path, and wherein the groove is provided with a tape lower face biasing member which is configured to be pressed by a lower face of the carrier tape and is configured to be deformed downward when the carrier tape has the component storage section protruding, and which is configured to bias the lower face of the carrier tape when the carrier tape has the component storage section not protruding, until the carrier tape inserted from the tape insertion section reaches the rear side sprocket.