An anti-lock brake control method for a bar handle vehicle, the method comprising: detecting an acceleration of the bar handle vehicle by an acceleration sensor of which detection axis does not direct to a back-and-forth direction and left-and-right direction of the bar handle vehicle, wherein said detection axis is shifted by a first angle relative to an up-and-down axis and wherein an acceleration applied in an up-and-down direction is calculated based on an acceleration detected by said acceleration sensor and said first angle; and deriving a lateral acceleration (α lat), which is horizontal to a ground, based on the detected acceleration; estimating a turning state of the bar handle vehicle based on the derived lateral acceleration (α lat); and changing a threshold value (AFth) for starting antilock control based on the turning state and to control braking force applied to the bar handle vehicle based on the estimated turning state, acquiring a back-and-forth acceleration (α long) occurring in the back-and-forth direction of the bar handle vehicle; characterised in that the method further comprises: setting the threshold value (AFth)representing an upper limit of the back-and-forth acceleration (α long) generated by a braking operation based on the derived lateral acceleration (α lat); and, controlling the braking force of the bar handle vehicle using the back-and-forth acceleration (α long) and the threshold value(AFth) as not to exceed the upper limit of the back-and-forth acceleration (α long), and wherein the threshold value (AFth) is set based on the expression: (μg) 2 - α lat 2 ≥ α long 2 wherein (μ) is a road surface friction coefficient, (g) is gravity acceleration, (α lat) is the derived lateral acceleration during turning, and (α long) is the back-and-forth acceleration. detecting an acceleration of the bar handle vehicle by an acceleration sensor of which detection axis does not direct to a back-and-forth direction and left-and-right direction of the bar handle vehicle, wherein said detection axis is shifted by a first angle relative to an up-and-down axis and wherein an acceleration applied in an up-and-down direction is calculated based on an acceleration detected by said acceleration sensor and said first angle; and deriving a lateral acceleration (α lat), which is horizontal to a ground, based on the detected acceleration; estimating a turning state of the bar handle vehicle based on the derived lateral acceleration (α lat); and changing a threshold value (AFth) for starting antilock control based on the turning state and to control braking force applied to the bar handle vehicle based on the estimated turning state, acquiring a back-and-forth acceleration (α long) occurring in the back-and-forth direction of the bar handle vehicle; characterised in that the method further comprises: setting the threshold value (AFth)representing an upper limit of the back-and-forth acceleration (α long) generated by a braking operation based on the derived lateral acceleration (α lat); and, controlling the braking force of the bar handle vehicle using the back-and-forth acceleration (α long) and the threshold value(AFth) as not to exceed the upper limit of the back-and-forth acceleration (α long), and wherein the threshold value (AFth) is set based on the expression: (μg) 2 - α lat 2 ≥ α long 2 wherein (μ) is a road surface friction coefficient, (g) is gravity acceleration, (α lat) is the derived lateral acceleration during turning, and (α long) is the back-and-forth acceleration. setting the threshold value (AFth)representing an upper limit of the back-and-forth acceleration (α long) generated by a braking operation based on the derived lateral acceleration (α lat); and, controlling the braking force of the bar handle vehicle using the back-and-forth acceleration (α long) and the threshold value(AFth) as not to exceed the upper limit of the back-and-forth acceleration (α long), and wherein the threshold value (AFth) is set based on the expression: (μg) 2 - α lat 2 ≥ α long 2 wherein (μ) is a road surface friction coefficient, (g) is gravity acceleration, (α lat) is the derived lateral acceleration during turning, and (α long) is the back-and-forth acceleration.