A bicycle disc brake caliper comprises a caliper body. The caliper body includes a slot in which a brake pad is arranged. The caliper body includes a first body portion, a second body portion, a mounting surface, a first receiving hole, a cylinder bore, and a second cylinder bore. The second body portion is coupled to the first body portion so as to provide a slot therebetween. The mounting surface is configured to face a pipe portion of a bicycle body in a mounted state where the bicycle disc brake caliper is mounted to the bicycle body. The first receiving hole is provided on the mounting surface. The first receiving hole is configured to be threadedly engaged with a fastener to mount the bicycle disc brake caliper to the bicycle body. The first cylinder bore is provided on the first body portion. The second cylinder bore is provided on the first body portion.