An accelerator position detection device comprising: a handlebar grip that is turnable in a normal rotation direction and in a reverse rotation direction from a neutral position and that is energized to the neutral position when no operation is applied; accelerator position sensors (81, 82) that output voltage according to an angle of the handlebar grip and that include a first sensor and a second sensor; and a detector that detects an angle for control for controlling a vehicle on the basis of the angle of the handlebar grip according to output from the accelerator position sensors (81, 82), wherein the first sensor outputs first voltage rising in volume from a position exceeding a first rise start angle located in a normal rotation direction by predetermined quantity from the neutral position in the normal rotation direction; the second sensor outputs second voltage rising in volume from a position exceeding a second rise start angle located in a reverse rotation direction from the neutral position by predetermined quantity in the normal rotation direction; characterized in that the detector detects an angle for control continuously increasing according to an increase of the first voltage and the second voltage as the positive value and the negative value by detecting an angle for control when the first voltage starts to rise as zero, and by detecting an angle for control as a positive value according to a rising amount of the first voltage when the first voltage in a rising range is output, and by detecting an angle for control as a negative value according to a rising amount of the second voltage when the first initial value not located in the rising range is output; and a controller that executes first control according to the angle for control as the positive value and that executes second control which differs from the first control according to the angle for control as the negative value is further provided. a handlebar grip that is turnable in a normal rotation direction and in a reverse rotation direction from a neutral position and that is energized to the neutral position when no operation is applied; accelerator position sensors (81, 82) that output voltage according to an angle of the handlebar grip and that include a first sensor and a second sensor; and a detector that detects an angle for control for controlling a vehicle on the basis of the angle of the handlebar grip according to output from the accelerator position sensors (81, 82), wherein the first sensor outputs first voltage rising in volume from a position exceeding a first rise start angle located in a normal rotation direction by predetermined quantity from the neutral position in the normal rotation direction; the second sensor outputs second voltage rising in volume from a position exceeding a second rise start angle located in a reverse rotation direction from the neutral position by predetermined quantity in the normal rotation direction; characterized in that the detector detects an angle for control continuously increasing according to an increase of the first voltage and the second voltage as the positive value and the negative value by detecting an angle for control when the first voltage starts to rise as zero, and by detecting an angle for control as a positive value according to a rising amount of the first voltage when the first voltage in a rising range is output, and by detecting an angle for control as a negative value according to a rising amount of the second voltage when the first initial value not located in the rising range is output; and a controller that executes first control according to the angle for control as the positive value and that executes second control which differs from the first control according to the angle for control as the negative value is further provided.