A bicycle disc brake rotor comprises a friction member and a cooling member. The friction member includes at least one friction surface and a first inner peripheral edge. The cooling member includes a cooling body. The cooling body includes at least one cooling surface and a second inner peripheral edge. The second inner peripheral edge is provided radially inward of the first inner peripheral edge with respect to a rotational center axis of the bicycle disc brake rotor. The radially outer part is provided radially outward of the cooling body. The second inner peripheral edge is offset from the radially outer part in an axial direction parallel to the rotational center axis of the bicycle disc brake rotor.