A regenerative brake control device of a vehicle, the regenerative brake control device which is configured to control a rotary electric motor that is configured to drive wheels at a regeneration ratio corresponding to a selected regeneration stage (B0 to B5) to thereby obtain a regenerative brake force, the regenerative brake control device comprising: a selecting section which is manually operated to select a regeneration stage from a plurality of regeneration stages (B0 to B5) which have been set; a detecting section (35, 36) which detects operations on the selecting section; and a control section which is configured to change the regeneration stage (B0 to B5) in accordance with the operations detected by the detecting section (35, 36), wherein when the detecting section (35, 36) detects that a first operation is performed on the selecting section within a predetermined time, the control section changes the regeneration stage (B0 to B5) in a first pattern (pattern 1) in which a current regeneration stage is increased or decreased to another regeneration stage one by one in response to the first operation, and when the detecting section (35, 36) detects that a second operation different from the first operation is performed on the selecting section within the predetermined time, the control section changes the regeneration stage (B0 to B5) in a second pattern (pattern 2) in which the regeneration stage (B0 to B5) is changed automatically stepwise to a target regeneration stage in a direction of increasing or decreasing the regenerative brake force, the target regeneration stage is a maximum regeneration stage or a minimum regeneration stage of the plurality of regeneration stages (B0 to B5), characterized in that the control section is configured to make control so that an automatic stage change speed of the regeneration stage (B0 to B5) is changed in accordance with a state of the vehicle, the state of the vehicle being at least one of: an operation state of a brake section that is configured to generate a brake force in the vehicle; a speed of the vehicle; and a comparison of a charging rate of a battery that is configured to supply an electric power to the rotary electric motor with a predetermined charging value. a selecting section which is manually operated to select a regeneration stage from a plurality of regeneration stages (B0 to B5) which have been set; a detecting section (35, 36) which detects operations on the selecting section; and a control section which is configured to change the regeneration stage (B0 to B5) in accordance with the operations detected by the detecting section (35, 36), wherein when the detecting section (35, 36) detects that a first operation is performed on the selecting section within a predetermined time, the control section changes the regeneration stage (B0 to B5) in a first pattern (pattern 1) in which a current regeneration stage is increased or decreased to another regeneration stage one by one in response to the first operation, and when the detecting section (35, 36) detects that a second operation different from the first operation is performed on the selecting section within the predetermined time, the control section changes the regeneration stage (B0 to B5) in a second pattern (pattern 2) in which the regeneration stage (B0 to B5) is changed automatically stepwise to a target regeneration stage in a direction of increasing or decreasing the regenerative brake force, the target regeneration stage is a maximum regeneration stage or a minimum regeneration stage of the plurality of regeneration stages (B0 to B5), characterized in that the control section is configured to make control so that an automatic stage change speed of the regeneration stage (B0 to B5) is changed in accordance with a state of the vehicle, the state of the vehicle being at least one of: an operation state of a brake section that is configured to generate a brake force in the vehicle; a speed of the vehicle; and a comparison of a charging rate of a battery that is configured to supply an electric power to the rotary electric motor with a predetermined charging value. an operation state of a brake section that is configured to generate a brake force in the vehicle; a speed of the vehicle; and a comparison of a charging rate of a battery that is configured to supply an electric power to the rotary electric motor with a predetermined charging value.