Provincial Road 403 (PR 403) is a 25.5-kilometre-long (15.8 mi) east–west highway in the Eastman Region of Manitoba, Canada.

PR 403 begins along the banks of the Rat River in the Rural Municipality of De Salaberry at an intersection with PTH 59 on the northern edge of St. Malo.

It heads east as a paved two-lane highway along the northern border of St. Malo Provincial Park before having a junction with PR 216, where the pavement turns to gravel.

The highway travels through Barkfield before entering the Rural Municipality of Hanover and passing through the community of Pansy.

Entering the Rural Municipality of La Broquerie, where it comes to an end at an intersection with PTH 12 just north of Zhoda.