A modular hand cart comprising a main frame supporting a load carrying surface and adapted to receive in a plurality of longitudinal positions a single or multi-wheeled undercarriage module. At one end of the main frame is pivotally attached a headboard which may be positioned in a plurality of angular relationships with the main frame. This headboard carries handles which may be angularly adjusted with respect to the headboard. Rear support legs are provided under the main frame, and the end of the main frame remote from the support legs carries a pair of attachment mounting brackets suitable for the carriage and control of a plurality of different attachments.