Bicycle front derailleur

An electric front derailleur comprising:

• a chain guide;
• a linkage assembly movably connected to the chain guide;
• an electrical actuation unit operatively coupled to the linkage assembly to move the chain guide with respect to the electrical actuation unit;
• and
• a base member forming a four-bar linkage mechanism along with the chain guide and the linkage assembly, wherein
• the electrical actuation unit includes a mounting portion configured to be attached to a bicycle frame,
• the mounting portion is secured to the electrical actuation unit and is separate from the base member,
• the mounting portion has one of a convex surface and a concave surface, the bicycle frame includes a mounting bracket and having the other of the convex surface and the concave surface, and the convex surface is configured to engage with the concave surface,
• the mounting portion has a bore, which is adapted to receive a fastener for fixing the mounting portion to the bicycle frame,
• the bore has a central bore axis extending in a front-rear direction in a state where the mounting portion is attached to the bicycle frame.