A foldable transport box, particularly for transporting small animals, having a bottom, at which two face walls and two side walls made from one or more parts are pivotally mounted. The face walls and the side walls are essentially collapsed onto the bottom in the folded state of the transport box, while in the erected state of the transport box, starting from the bottom, they are essentially erected aligned upwards. The side walls are connected to each other at the top in the erected state of the transport box in order to close the transport box at the top. The side walls are detachably connected to each other at the top of the transport box in the erected state, with at least one side wall being detachable from the face walls and pivotal towards the outside in order to open the transport box in the opened state.
