A movable support device for a person, in particular a disabled person, comprising - a base plate adapted to be arranged movably on a floor, the plate having a thickness along a first axis and at least a base portion delimited by first opposite ends (7, 8) along a second axis orthogonal to the first axis and by second opposite ends (9, 10) along a third axis orthogonal to the first and to the second axes (Z, X); - a structural support assembly for supporting the upper limbs of the person in an evacuation position, the assembly comprising a first structure and a second structure respectively fixed to the first ends (7, 8) and extending along the third axis beyond one of the second ends; - a footboard comprising at least a support surface for supporting the feet of the person; - first actuator means that support the footboard relative to the base portion and are controllable to displace the footboard relative to the base portion; wherein the base plate defines an empty volume adjacent to the base portion along the third axis between the first and the second structures, characterized by further comprising a control unit and a transducer configured to detect a quantity indicative of a weight applied on the footboard and to generate a relative signal, the control unit being configured to receive the signal from the transducer, extract from the signal an item of information indicative of the weight applied, and control the first actuator means to arrange the footboard as a function of the extracted item of information. - a base plate adapted to be arranged movably on a floor, the plate having a thickness along a first axis and at least a base portion delimited by first opposite ends (7, 8) along a second axis orthogonal to the first axis and by second opposite ends (9, 10) along a third axis orthogonal to the first and to the second axes (Z, X); - a structural support assembly for supporting the upper limbs of the person in an evacuation position, the assembly comprising a first structure and a second structure respectively fixed to the first ends (7, 8) and extending along the third axis beyond one of the second ends; - a footboard comprising at least a support surface for supporting the feet of the person; - first actuator means that support the footboard relative to the base portion and are controllable to displace the footboard relative to the base portion; wherein the base plate defines an empty volume adjacent to the base portion along the third axis between the first and the second structures, characterized by further comprising a control unit and a transducer configured to detect a quantity indicative of a weight applied on the footboard and to generate a relative signal, the control unit being configured to receive the signal from the transducer, extract from the signal an item of information indicative of the weight applied, and control the first actuator means to arrange the footboard as a function of the extracted item of information. wherein the base plate defines an empty volume adjacent to the base portion along the third axis between the first and the second structures, characterized by further comprising a control unit and a transducer configured to detect a quantity indicative of a weight applied on the footboard and to generate a relative signal, the control unit being configured to receive the signal from the transducer, extract from the signal an item of information indicative of the weight applied, and control the first actuator means to arrange the footboard as a function of the extracted item of information.