A tape curving attachment (20, 30) comprising: a tape curving section (50, 60) configured to curve component storage tape wound around a reel (Ra, Rb), the component storage tape being carrier tape with cavities in which components are stored and top tape attached to an upper surface of the carrier tape, wherein the tape curving section (50, 60) is configured to curve the component storage tape such that the radius of curvature of the top tape side of the component storage tape is smaller or larger than the radius of curvature of the carrier tape side of the component storage tape, the tape curving attachment (20, 30) being configured to be attached to a feeder that pitch feeds the component storage tape from the reel (Ra, Rb), wherein the tape curving attachment (20, 30) further comprises a frame (21, 31A), the frame (21, 31A) being provided with a catch (21A, 31Aa) on a rear end of the frame (21, 31A), the catch (21A, 31Aa) being configured to catch on a reel holding section of the feeder, and the tape curving section (50, 60) includes a first roller (12c, 31), a second roller (22, 32) and a third roller (23, 33), wherein the first roller is provided at the reel holding section and the second roller and the third roller are supported on the frame, or wherein the first roller, the second roller and the third roller are supported on the frame, and the component storage tape being fed on an upper side, a lower side, and an upper side of the first roller (12c, 31), the second roller (22, 32) and the third roller (23, 33) respectively. a tape curving section (50, 60) configured to curve component storage tape wound around a reel (Ra, Rb), the component storage tape being carrier tape with cavities in which components are stored and top tape attached to an upper surface of the carrier tape, wherein the tape curving section (50, 60) is configured to curve the component storage tape such that the radius of curvature of the top tape side of the component storage tape is smaller or larger than the radius of curvature of the carrier tape side of the component storage tape, the tape curving attachment (20, 30) being configured to be attached to a feeder that pitch feeds the component storage tape from the reel (Ra, Rb), wherein the tape curving attachment (20, 30) further comprises a frame (21, 31A), the frame (21, 31A) being provided with a catch (21A, 31Aa) on a rear end of the frame (21, 31A), the catch (21A, 31Aa) being configured to catch on a reel holding section of the feeder, and the tape curving section (50, 60) includes a first roller (12c, 31), a second roller (22, 32) and a third roller (23, 33), wherein the first roller is provided at the reel holding section and the second roller and the third roller are supported on the frame, or wherein the first roller, the second roller and the third roller are supported on the frame, wherein the first roller is provided at the reel holding section and the second roller and the third roller are supported on the frame, or wherein the first roller, the second roller and the third roller are supported on the frame, and the component storage tape being fed on an upper side, a lower side, and an upper side of the first roller (12c, 31), the second roller (22, 32) and the third roller (23, 33) respectively.