A bicycle component positioning device is basically provided with a fixed structure, a positioning member, a first restricting member and a second restricting member. The positioning member is movably coupled with respect to the fixed structure. The first restricting member is operatively engaged with the positioning member to only restrict movement of the positioning member in a first moving direction when the positioning member is in one of predetermined positions. The second restricting member is operatively engaged with the positioning member to only restrict movement of the positioning member in a second moving direction when the positioning member is in one of predetermined positions.