This sport bag comprises a flexible enclosure (2) delimiting an equipment storage space, as well as a rigid armature (4), attached to the enclosure, arranged outside the enclosure and provided to rest on a support surface (S) in two different positions, namely a first position, in which the armature (4) rests on the support surface (S) by at least three first bearing points, and a second position, in which the armature (4) rests on the bearing surface by at least three second bearing points. The three second bearing points are not all the same as the three first bearing points.