Method for determining an attention level of a driver of a motor vehicle, comprising the following steps, execution of the set of steps a) to e) being repeated continuously: a) an actual position (δ d) of a driving member of the motor vehicle is acquired, b) at least one datum relative to an environment in which said motor vehicle is being driven is acquired, c1) depending on said datum relative to the environment in which the motor vehicle is being driven, a target position ( δ̂ SW) in which the driving member should be placed if the attention level of the driver is high is determined, c2) a restoring quantity (Γ s) of the driving member is determined depending at least on the actual position ( δ d) of this driving member, said restoring quantity tending to return the driving member to a rest position, c3) a target quantity (Γ̂ d) representative of an action that the driver should apply to said driving member if the attention level of the driver is high is determined, depending on the target position ( δ̂ SW), on the actual position ( δ d) of the driving member of the vehicle, and on said restoring quantity (Γ s) of the driving member, d) an actual quantity (Γ d) representative of a control action of the driver on said driving member is acquired, e) said actual quantity (Γ d) and said target quantity (Γ̂ d) are compared by computing a difference (TPE(k)) between said actual quantity (Γ d) and said target quantity (Γ̂ d), f) said attention level is determined depending on the result of the comparison carried out in step e) by selecting the differences (TPE(j)) computed in a first time interval, and by computing a first effective value (VE C (k)) of the selected differences (TPE(j)), so as to deduce said attention level of the driver of the motor vehicle depending on said first effective value (VE C (k)), characterized in that, in step f), the differences (TPE(j)) computed in a second time interval longer than the first time interval are selected, a second effective value (VE L (k)) of the selected differences (TPE(j)) is computed, and said attention level of the driver of the motor vehicle is deduced depending on said second effective value (VE L (k)). a) an actual position (δ d) of a driving member of the motor vehicle is acquired, b) at least one datum relative to an environment in which said motor vehicle is being driven is acquired, c1) depending on said datum relative to the environment in which the motor vehicle is being driven, a target position ( δ̂ SW) in which the driving member should be placed if the attention level of the driver is high is determined, c2) a restoring quantity (Γ s) of the driving member is determined depending at least on the actual position ( δ d) of this driving member, said restoring quantity tending to return the driving member to a rest position, c3) a target quantity (Γ̂ d) representative of an action that the driver should apply to said driving member if the attention level of the driver is high is determined, depending on the target position ( δ̂ SW), on the actual position ( δ d) of the driving member of the vehicle, and on said restoring quantity (Γ s) of the driving member, d) an actual quantity (Γ d) representative of a control action of the driver on said driving member is acquired, e) said actual quantity (Γ d) and said target quantity (Γ̂ d) are compared by computing a difference (TPE(k)) between said actual quantity (Γ d) and said target quantity (Γ̂ d), f) said attention level is determined depending on the result of the comparison carried out in step e) by selecting the differences (TPE(j)) computed in a first time interval, and by computing a first effective value (VE C (k)) of the selected differences (TPE(j)), so as to deduce said attention level of the driver of the motor vehicle depending on said first effective value (VE C (k)), characterized in that, in step f), the differences (TPE(j)) computed in a second time interval longer than the first time interval are selected, a second effective value (VE L (k)) of the selected differences (TPE(j)) is computed, and said attention level of the driver of the motor vehicle is deduced depending on said second effective value (VE L (k)).