PURPOSE: To provide automotive door lower part structure enabling the discharge of water infiltrating into the inside of a door without providing a weatherstrip with a cutout.

CONSTITUTION: A gap 18 generated between a locker 16 extended in the longitudinal direction of a body and a lower end part 13 with a hole 15 for discharging water infiltrating into the inside of the door 12 of an automobile is closed by a weatherstrip 20 fitted to the lower end part 13 of the door 12. The weatherstrip 20 has a recessed part 26 extended in the longitudinal direction of the body so as to receive the water falling from the hole 15 of the door. The water entering the recessed part 26 is discharged from the front end part or rear end part of the weatherstrip 20.