A bicycle derailleur is basically provided with a main body, a chain cage, a first pulley, a second pulley and a chain contact member. The main body is configured to be mounted to a bicycle. The chain cage is pivotally coupled to the main body movement between at least a first orientation and a second orientation. The first pulley is rotatably coupled to one of the chain cage and the main body. The second pulley is rotatably mounted to the chain cage to move therewith relative to the main body. The chain contact member is coupled to the main body. The chain contact member includes a non-rotatable chain contact portion that projects into a chain path between the first and second pulleys while the chain cage is in the first orientation, and that is located outside of the chain path between the first and second pulleys while the chain cage is in the second orientation.