The present invention relates to a turbojet, comprising a fixed structure, a fan rotor (2), integral with a drive shaft (5) supported by a first bearing (6) and a second bearing (7). It is characterized by the fact that it comprises means (28) forming the axial retention of the fan rotor (2) and / or an emergency bearing, cooperating with means (32, 33) of the fixed structure, and mounted integral with the drive shaft (5) by particular, it comprises a structural flange (18) on which the second bearing is fixed (7), in which the means forming axial retaining of the fan (2) and / or an emergency bearing comprise a retaining disk (28), mounted on the drive shaft (5) and cooperating with a stop disk (33) of the flange (18) for axially retaining the fan (2) and a longitudinal sleeve (32) of the flange (18) in order to form an emergency bearing.
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