Cab door structure

A door structure for a cab comprising:

• a door frame defining an entrance to said cab;
• a door for opening and closing said entrance;
• a hinge disposed between said door and said door frame and having an axis, said door being configured to be allowed to swing about said axis of said hinge between an open position and a closed position;
• a door handle attached to said door for opening and closing said door;
• and
• a door lock for locking said door in said closed position;
• wherein said door includes a door body formed of resin, and a reinforcing frame fixed to said door body, and a gap between said door body and said door frame when said door is in said closed position being sealed by a seal material interposed between said door body and said door frame, and wherein said door body includes a curved portion which is curved inward relative to the cab over a substantially entire circumference of said door body, and lies outside of said reinforcing frame, said sealing material being disposed on an edge of said curved portion of said door body.