This finding relates to a pet carrier, of the type comprising two half-shells (1, 2) of substantially identical shape and sizes, to be arranged so that they mutually face the respective concavities, said half-shells (1, 2) forming the two halves of a carrier (100), being provided that the two half-shells (1, 2), once arranged mutually on top of each other, form a substantially parallelepiped-shaped structure, at least one of the two half-shells having a resealable gap that can be closed by means of a door (8), or a grating or the like, being also provided means which allow the mutual reversible fastening of said two half-shells (1, 2). Said carrier (100) is characterized in that the two half-shells (1, 2) are substantially symmetrical with respect to a plane that intersects side faces (4) of the carrier (100) along a diagonal (7) thereof, and also in that the door (8), the grating or the like extends for the most part in correspondence with one of the largest faces of the half-shell (1), said door (8) being reversibly fastened to said half-shell (1).