Abstract: A four wheeled horse wagon which is readily convertible into a two wheeled towing trailer for towing by a motorized vehicle. The horse wagon comprises a main frame apparatus having a goose neck apparatus for mounting a detachable front wheel assembly apparatus. The goose neck apparatus and front wheel assembly apparatus are connected by ball hitch apparatus which provides limited universal swiveling movement of the front wheel assembly apparatus relative the goose neck apparatus to facilitate steering and reduce drawbar loading. Various draw bar apparatus for attaching one or more horses to the horse wagon are described. Removable wagon body apparatus mountable on the main frame means are also described.