An electric bicycle regenerative brake control device for controlling an assist motor to generate regenerative braking force, in relation to a brake mechanism (117f, 117r) that comprises a braking device (107f, 107r) as well as a brake lever (16f, 16r) having a swinging lever member, which is capable of swinging between an initial position and a maximum swing position, and wherein the brake mechanism (117f, 117r) can be mounted on an electric bicycle in which human-powered driving by a rider is assisted by the assist motor so that an assist force is generated by the assist motor which can be larger than the pedaling force applied by the rider; the electric bicycle regenerative brake control device comprising a first control part, a second control part, and a switch control part, wherein the first control part is configured to control the assist motor so as to generate a uniform first regenerative braking force which is irrespective of whether mechanical braking by the brake mechanism (117f, 117r) is being performed; the second control part is configured to control the assist motor so as to generate a gradually increasing second regenerative braking force when the brake mechanism (117f, 117r) shifts from an initial state to a braking state, and the second control part is configured to control the assist motor according to operation of a bicycle brake lever (16f, 16r); characterized in that the switch control part is configured to switch to a control performed by the second control part when the brake mechanism (117f, 117r) shifts from the initial state to the braking state while control is being performed by the first control part; wherein the electric bicycle regenerative brake control device further comprises a movement position detecting part and a position determining part; the movement position detecting part being configured to detect a position of movement of the swinging lever member of the brake lever (16f, 16r) from the initial position of the swinging lever member at which the swinging lever member is in the furthest position from a handlebar; and the position determining part being configured to determine whether the position of movement from the initial position of the swinging lever member has exceeded a predetermined position; wherein the switch control part is configured to control the assist motor so that the first control part generates the first regenerative braking force until the movement position from the initial position of the swinging lever member exceeds the predetermined position, and is configured to control the assist motor so that the second control part generates the second regenerative braking force when the movement position from the initial position of the swinging lever member exceeds the predetermined position; wherein the position determining part is configured to determine the movement position from the initial position of the swinging lever member at which the second regenerative braking force exceeds the first regenerative braking force as the predetermined position. the electric bicycle regenerative brake control device comprising a first control part, a second control part, and a switch control part, wherein the first control part is configured to control the assist motor so as to generate a uniform first regenerative braking force which is irrespective of whether mechanical braking by the brake mechanism (117f, 117r) is being performed; the second control part is configured to control the assist motor so as to generate a gradually increasing second regenerative braking force when the brake mechanism (117f, 117r) shifts from an initial state to a braking state, and the second control part is configured to control the assist motor according to operation of a bicycle brake lever (16f, 16r); characterized in that the switch control part is configured to switch to a control performed by the second control part when the brake mechanism (117f, 117r) shifts from the initial state to the braking state while control is being performed by the first control part; wherein the electric bicycle regenerative brake control device further comprises a movement position detecting part and a position determining part; the movement position detecting part being configured to detect a position of movement of the swinging lever member of the brake lever (16f, 16r) from the initial position of the swinging lever member at which the swinging lever member is in the furthest position from a handlebar; and the position determining part being configured to determine whether the position of movement from the initial position of the swinging lever member has exceeded a predetermined position; wherein the switch control part is configured to control the assist motor so that the first control part generates the first regenerative braking force until the movement position from the initial position of the swinging lever member exceeds the predetermined position, and is configured to control the assist motor so that the second control part generates the second regenerative braking force when the movement position from the initial position of the swinging lever member exceeds the predetermined position; wherein the position determining part is configured to determine the movement position from the initial position of the swinging lever member at which the second regenerative braking force exceeds the first regenerative braking force as the predetermined position.