The invention deals with a method for determining a vigilance state of a driver of a vehicle that comprises a steering wheel (1) including at least a first sensor (10) adapted to detect a contact or a pressure exerted by the hand of said driver on said steering wheel, said method including steps of:- measuring a variable relative to the contact or to the pressure exerted by the hand of the driver on the steering wheel, thanks to said first sensor,- comparing said variable with a first threshold, and- deducing from the result of said comparison a first value of the vigilance state of the driver.According to the invention, the vehicle comprises at least a second sensor (20) adapted to measure a parameter used to determine a second value of the vigilance state of the driver, and said first threshold is determined on the basis of said second value.
