To provide a folding type passenger car cover which can be easily developed to cover a passenger car when it is parked in a roadside parking zone or parking area with no roof without damaging the body of the car, and which can be folded to become compact to be stored in a trunk room when unused.

This device comprises a cover sheet 14 to cover upper parts of the passenger car, an umbrella frame-like support structure 4 provided at a center to be opened as an opening operation rod 1 provided with a bending part 8 halfway is pulled up, kept opened by as the opening operation rod 1 is bent at the bending part 8, and closed as the opening operation rod 1 is returned straight, and then pushed down, a shock absorbing sheet 20 and a shock absorbing pad 21 for protecting the body disposed on the underside of the umbrella frame-like support structure 4, and hooks 17 attached to both sides at a front and a rear parts of the cover sheet 14 to be hooked to the body of the passenger car.