A device for loading a guide wire into the open end of a tubular instrument, such as a catheter. The device can be a block of material having a groove in its surface. The ends of the guide wire and the tubular instrument are placed into the groove and moved toward each other. When the ends meet, the groove guides the guide wire into the open end of the tubular instrument. The groove, or at least a portion of the groove, can have a cross-sectional contour that closely matches the outside radius of the tubular instrument. The groove can have a substantially vertical wall and a substantially non-vertical wall. A variety of attachment mechanisms may be provided for attaching the device to a towel draping a patient. A retaining member is disposed on the surface of the device for retaining a guide wire or tubular instrument against movement.
