System for assembling an airbag channel in an orifice of a vehicle interior cladding support panel, the airbag channel taking the form of an axial duct which comprises, on the one hand, an inner face and an outer face and, on the other hand, an outer orifice situated at a first end of the duct and intended to be associated with at least one shutter to be positioned towards the inside of the vehicle and an inner orifice situated at a second end of the duct and intended to be positioned at the airbag module in which the airbag cushion is placed, folded down before the deployment thereof, the vehicle interior cladding support panel having a support surface and an orifice arranged for the positioning of an airbag channel, wherein the assembly system comprises at least: - on the airbag channel: • a peripheral rim positioned on the perimeter of the outer orifice of the airbag channel and disposed so as to cover a portion of the surface of the interior cladding panel situated at the edge of the orifice of the support panel, • at least one protruding element positioned on the outer face of the duct, characterized in that - at the edge of the orifice of the vehicle interior cladding support panel, at least a portion of the edge of the orifice structurally configured to be positioned, on the one hand, opposite the outer face of the duct of the airbag channel and, on the other hand, between the peripheral rim and the protruding element of the outer face of the duct of the airbag channel, at least a portion of the edge of the orifice is structurally configured so as to comprise at least, on the one hand, a first bearing point bearing against a face of the peripheral rim of the airbag channel and, on the other hand, a second bearing point bearing against the protruding element positioned on the outer face of the duct of the airbag channel. - on the airbag channel: • a peripheral rim positioned on the perimeter of the outer orifice of the airbag channel and disposed so as to cover a portion of the surface of the interior cladding panel situated at the edge of the orifice of the support panel, • at least one protruding element positioned on the outer face of the duct, characterized in that • a peripheral rim positioned on the perimeter of the outer orifice of the airbag channel and disposed so as to cover a portion of the surface of the interior cladding panel situated at the edge of the orifice of the support panel, • at least one protruding element positioned on the outer face of the duct, characterized in that - at the edge of the orifice of the vehicle interior cladding support panel, at least a portion of the edge of the orifice structurally configured to be positioned, on the one hand, opposite the outer face of the duct of the airbag channel and, on the other hand, between the peripheral rim and the protruding element of the outer face of the duct of the airbag channel, at least a portion of the edge of the orifice is structurally configured so as to comprise at least, on the one hand, a first bearing point bearing against a face of the peripheral rim of the airbag channel and, on the other hand, a second bearing point bearing against the protruding element positioned on the outer face of the duct of the airbag channel.