A bicycle component fixing structure has a fixing nut that is configured to be coupled to a handlebar clamp and a fixing bolt. The fixing nut includes a threaded bore with an entrance opening and an exit opening. The threaded bore has a first axial length between the entrance and exit openings. The fixing nut defines a bolt shaft receiving space that is disposed adjacent the bolt exit opening. The fixing bolt includes a head and a shaft. The shaft has a non-threaded portion disposed between first and second threaded portions. The first threaded portion is disposed closer to the head of the fixing bolt than the second threaded portion. The first and second threaded portions threadedly engage the threaded bore of the fixing nut. The non-threaded portion has a second axial length that is greater than the first axial length of the threaded bore of the fixing nut.