Abstract: Improvements in shopping cart corrals of the type used in parking lots of supermarket stores; provision of an improved shopping cart corral construction which is alternatively (a) pivotable at certain joints thereof and foldable upon itself for storage and transportation and (b), on the other hand, lockable in rigid structural position for use in a supermarket parking lot; in shopping cart corrals typically having one closed and one open end with elongate fence portions enclosing the space between the two ends, the provision of mounting means for the elongate fence portions on the closed end portion which permit both (a) pivoting and folding of the elements of the device upon itself for storage and transport and (b) locking of the sides and ends of the device rigidly with respect to one another for use.