Device for measuring the relative orientation of two skis comprising: - a first sensor configured to be arranged on a first ski or on a first ski boot, the first sensor being configured to provide first data relative to a first angle existing between a first plane (x1, y1) and the vertical, the first plane being representative of the sole of the first ski or of the sole of the first ski boot, - an additional first sensor configured to be arranged on the first ski or on the first ski boot, the additional first sensor being configured to provide additional first data relative to the orientation of the longitudinal axis of the first ski or of the first ski boot with respect to a first fixed spatial reference frame, - a second sensor configured to be arranged on a second ski or on a second ski boot, the second sensor being configured to provide second data relative to a second angle existing between a second plane (x2, y2) and the vertical, the second plane being representative of the sole of the second ski or of the sole of the second ski boot, - an additional second sensor configured to be arranged on the second ski or on the second ski boot, the additional second sensor being configured to provide additional second data relative to the orientation of the longitudinal axis of the second ski or of the second ski boot with respect to a first fixed spatial reference frame, - a control circuit configured to ∘ compare the value of the first angle with the value of the second angle, ∘ record the orientation of the longitudinal axis of the first ski or of the first ski boot and the orientation of the longitudinal axis of the second ski or of the second ski boot as corresponding to a configuration where the longitudinal axis of the first ski is parallel to the longitudinal axis of the second ski when the value of the first angle is equal to the value of the second angle. - a first sensor configured to be arranged on a first ski or on a first ski boot, the first sensor being configured to provide first data relative to a first angle existing between a first plane (x1, y1) and the vertical, the first plane being representative of the sole of the first ski or of the sole of the first ski boot, - an additional first sensor configured to be arranged on the first ski or on the first ski boot, the additional first sensor being configured to provide additional first data relative to the orientation of the longitudinal axis of the first ski or of the first ski boot with respect to a first fixed spatial reference frame, - a second sensor configured to be arranged on a second ski or on a second ski boot, the second sensor being configured to provide second data relative to a second angle existing between a second plane (x2, y2) and the vertical, the second plane being representative of the sole of the second ski or of the sole of the second ski boot, - an additional second sensor configured to be arranged on the second ski or on the second ski boot, the additional second sensor being configured to provide additional second data relative to the orientation of the longitudinal axis of the second ski or of the second ski boot with respect to a first fixed spatial reference frame, - a control circuit configured to ∘ compare the value of the first angle with the value of the second angle, ∘ record the orientation of the longitudinal axis of the first ski or of the first ski boot and the orientation of the longitudinal axis of the second ski or of the second ski boot as corresponding to a configuration where the longitudinal axis of the first ski is parallel to the longitudinal axis of the second ski when the value of the first angle is equal to the value of the second angle. ∘ compare the value of the first angle with the value of the second angle, ∘ record the orientation of the longitudinal axis of the first ski or of the first ski boot and the orientation of the longitudinal axis of the second ski or of the second ski boot as corresponding to a configuration where the longitudinal axis of the first ski is parallel to the longitudinal axis of the second ski when the value of the first angle is equal to the value of the second angle.