A stretcher for lifting injured people without need of moving them (A) comprising a frame (1) supporting four rollers (2), (2'), (2"), (2"'), rotating independently, two by two in axis between them, and two by two opposed, and connected respectively by a sheet (3), wherein said two sheets (3) of the stretcher (A) are paired, and when stretched parallel between them, and when loosened and inserted under the body of an injured person (B) are stretched and locked thus permitting the injured person to be lifted and carried without being moved. The action of loosening, in neutral, of stretching and locking in said position of said sheets (3) is carried out by means of lever or jack crank (5), inserted on the pin (6) of a box containing suitable gears (7), for controlling each winding roller respectively,