A device for transporting an animal, which device may be in a folded and a folded-out state, and the device comprises a rectangular bottom with - two long sides of length L; - two short sides with width B, and - corners (3, 4, 5, 6) and the device comprises in the unfolded state upright first and second side walls (7, 8, 9, 10) that are connected on the long sides and short sides of the bottom with the rectangular bottom, which side walls of the bottom comprise a remote upper edge (11, 12, 13, 14) and at the peripheral edges of the rectangular bottom an adjoining lower edge, wherein - the long sides of the bottom are provided with first side walls (7, 8) with a length L; - the short sides of the bottom are provided with second side walls (9, 10) having a width B, and the second side walls (9, 10) comprise fold lines to facilitate folding of the device from the unfolded state to the folded state and the bottom is divided into bottom portions by a fold line running parallel with the long sides to facilitate folding the device from the unfolded state to the folded state, characterized in that at each short side of the device rigidity-providing wall portions (14, 15) are provided at the location of at least one of the corners (3, 4, 5, 6), which stiffness-providing wall portions (14, 15) can be secured to the second side walls (9, 10), which stiffness-providing wall portions (14, 15) are hingable about an axis transverse to the rectangular bottom at the location of the relevant corner; which stiffness-providing wall portions (14, 15) in a folded-out state of the device in which they are turned to the second side walls and are secured to the second side walls (9, 10) maintain the device in the unfolded state by increasing the stiffness of the second side walls (9, 10), and in a folded state are turned to the first side walls and are located between the first side walls and the bottom portions adjacent to the first side walls. - two long sides of length L; - two short sides with width B, and - corners (3, 4, 5, 6) and the device comprises in the unfolded state upright first and second side walls (7, 8, 9, 10) that are connected on the long sides and short sides of the bottom with the rectangular bottom, which side walls of the bottom comprise a remote upper edge (11, 12, 13, 14) and at the peripheral edges of the rectangular bottom an adjoining lower edge, wherein - the long sides of the bottom are provided with first side walls (7, 8) with a length L; - the short sides of the bottom are provided with second side walls (9, 10) having a width B, and the second side walls (9, 10) comprise fold lines to facilitate folding of the device from the unfolded state to the folded state and the bottom is divided into bottom portions by a fold line running parallel with the long sides to facilitate folding the device from the unfolded state to the folded state, characterized in that at each short side of the device rigidity-providing wall portions (14, 15) are provided at the location of at least one of the corners (3, 4, 5, 6), which stiffness-providing wall portions (14, 15) can be secured to the second side walls (9, 10), which stiffness-providing wall portions (14, 15) are hingable about an axis transverse to the rectangular bottom at the location of the relevant corner; which stiffness-providing wall portions (14, 15) in a folded-out state of the device in which they are turned to the second side walls and are secured to the second side walls (9, 10) maintain the device in the unfolded state by increasing the stiffness of the second side walls (9, 10), and in a folded state are turned to the first side walls and are located between the first side walls and the bottom portions adjacent to the first side walls.