The invention relates to the field of stormwater drainage. A box-shaped rain catch basin is provided with a flange along the perimeter of the upper portion thereof, said flange having a horizontal support surface. The lateral sides of the rain catch basin are provided with: horizontal outlet fittings having a U-shaped profile for connecting thereto a rain catch tray having a U-shaped profile; and/or with horizontal cylindrical outlet fittings for connecting a stormwater drainage pipe thereto. The rain catch basin is collapsible. The vertical ends of each lateral side of the rain catch basin are provided with locking elements for connecting adjacent sides and for assembling same into a box. The lower edge of the sides of the rain catch basin are provided with horizontal slots capable of accommodating a removable rectangular bottom. Provided is a rain catch basin which is maximally tightly packed from the standpoint of storage and transportation.
