HOLDER AND WIRE HARNESS

A holder including: an inner fitting that is configured to be fitted into a longitudinal end of a cylinder that covers an outer circumference of a wire; a holding piece that protrudes from the inner fitting outward of the longitudinal end of the cylinder, and is configured to hold the wire; and a fixing portion that protrudes radially outward from the inner fitting, wherein the fixing portion includes: an outward extension that protrudes radially outward from the inner fitting and is configured to pass through a through portion provided in the cylinder; and a bent extension that bends and extends from a leading end of the outward extension.