Bicycle front derailleur capable of preventing chain falling

The utility model discloses a bicycle front derailleur capable of preventing a chain from falling off. The bicycle front derailleur comprises a front derailleur main body and a chain guide structure arranged on the front derailleur main body, wherein the front derailleur main body comprises a fixed bracket, an inner connecting piece, an outer connecting piece and a derailleur cage; one end of the inner connecting piece is hinged to the fixing support, and the other end of the inner connecting piece is hinged to the chain shifting cage. One end of the outer connecting piece is hinged to the fixing support, and the other end of the outer connecting piece is hinged to the chain shifting cage. The guide chain structure comprises a guide chain piece arranged on the fixing support. The bicycle front derailleur can prevent the transmission chain from falling off in the gear shifting process, and has the advantages of being simple in structure and low in production cost. 本实用新型公开一种防掉链的自行车前拨链器，包括前拨链器主体以及设置在所述前拨链器主体上的导链