Method for measuring the total pressure, the angle of attack and the sideslip angle of the longitudinal axis (L-L) of an aircraft with respect to the relative wind, in which method a probe is used which is provided, at the profiled front end thereof, with a central directional sensor which is arranged at the intersection of the horizontal (H-H) and vertical (V-V) midplanes of said probe, and with at least two eccentric midplane directional sensors (4, 5) which are in parallel with said central directional sensor and are arranged at an equal distance therefrom on either side of said horizontal midplane (H-H) of said probe, the central directional sensor being a Pitot tube according to which method: - said probe is pivotally connected to said aircraft about a first pivot axis which is in parallel with said horizontal midplane (H-H) of said probe and is orthogonal to said longitudinal axis (L-L) of the aircraft; - said probe is rotated about said first pivot axis in order make said probe assume the particular inclined position in which the measurements provided by said eccentric midplane directional sensors (4, 5) are equal; and - the particular angle of inclination (a) which is produced, in this particular inclined position, between said horizontal midplane (H-H) of the probe and the longitudinal axis (L-L) of the aircraft is measured, the particular angle of inclination (α) being representative of the angle of attack, - said probe is provided, at the front end thereof and in addition to said central directional sensor and said eccentric midplane directional sensors (4, 5), with at least two lateral directional sensors (12, 13) which are in parallel with said central directional sensor and are arranged at an equal distance therefrom on either side of said vertical midplane (V-V) of said probe, and in that, in addition, in order to measure the sideslip of the aircraft: - said probe is pivotally connected to said aircraft about a second pivot axis (X-X) which is in parallel with said longitudinal axis (L-L) of the aircraft; - said probe and said first pivot axis are rotated about said second pivot axis (X-X) in order make said probe assume the particular combined inclined position in which not only are the measurements provided by said eccentric midplane directional sensors (4, 5) equal, but so too are the measurements provided by said lateral directional sensors (13, 14); and - the particular value of the angle of rotation of said second pivot axis in said particular combined inclined position of the probe is measured, the angle of rotation being representative of the sideslip angle; - the total pressure is measured by the central directional sensor. - said probe is pivotally connected to said aircraft about a first pivot axis which is in parallel with said horizontal midplane (H-H) of said probe and is orthogonal to said longitudinal axis (L-L) of the aircraft; - said probe is rotated about said first pivot axis in order make said probe assume the particular inclined position in which the measurements provided by said eccentric midplane directional sensors (4, 5) are equal; and - the particular angle of inclination (a) which is produced, in this particular inclined position, between said horizontal midplane (H-H) of the probe and the longitudinal axis (L-L) of the aircraft is measured, the particular angle of inclination (α) being representative of the angle of attack, - said probe is provided, at the front end thereof and in addition to said central directional sensor and said eccentric midplane directional sensors (4, 5), with at least two lateral directional sensors (12, 13) which are in parallel with said central directional sensor and are arranged at an equal distance therefrom on either side of said vertical midplane (V-V) of said probe, and in that, in addition, in order to measure the sideslip of the aircraft: - said probe is pivotally connected to said aircraft about a second pivot axis (X-X) which is in parallel with said longitudinal axis (L-L) of the aircraft; - said probe and said first pivot axis are rotated about said second pivot axis (X-X) in order make said probe assume the particular combined inclined position in which not only are the measurements provided by said eccentric midplane directional sensors (4, 5) equal, but so too are the measurements provided by said lateral directional sensors (13, 14); and - the particular value of the angle of rotation of said second pivot axis in said particular combined inclined position of the probe is measured, the angle of rotation being representative of the sideslip angle; - the total pressure is measured by the central directional sensor. - said probe is pivotally connected to said aircraft about a second pivot axis (X-X) which is in parallel with said longitudinal axis (L-L) of the aircraft; - said probe and said first pivot axis are rotated about said second pivot axis (X-X) in order make said probe assume the particular combined inclined position in which not only are the measurements provided by said eccentric midplane directional sensors (4, 5) equal, but so too are the measurements provided by said lateral directional sensors (13, 14); and - the particular value of the angle of rotation of said second pivot axis in said particular combined inclined position of the probe is measured, the angle of rotation being representative of the sideslip angle; - the total pressure is measured by the central directional sensor.