A door weatherstrip for a vehicle includes an extrusion part, which is mounted by insertion onto a flange 25 formed on the vertical side edge of a first-closing door 3 among double doors 3 and 4, and a molded part 51, which is integrally formed on the upper end of the extrusion part and seals between the first-closing door 3 and a next-closing door 4 when the doors 3 and 4 are closed. A molded part 51 has a wider part 31a including a deep insertion groove 29, and a slit 52 is formed in the door width direction from the side end on the sidewall 31, and water that has invaded through between the flange 25 and the molded part 51 flows out onto a drip channel 8 established on the upper edge of the door opening of the body via the slit 52.