Cabin structure with a one-piece roof for a street-cleaning vehicle.

The structure has a cabin comprising a wind shield (3) covering the front part of a vehicle along a roof (5). An air supply block is disposed in the back of the cabin between a rear wall of a cab interior and a tub covering wastes. The roof comprises a horizontal upper covering part (5`) and a rear vertical part (5``) presenting a hollow structure. The air supply block is connected to the rear vertical part through an opening.