Multifunctional apparatus for the passive physical rehabilitation of a user, comprising a first main frame, and a second frame which incorporates a seat (3,31) and a backrest for the supporting of a user, comprising: - Footrests as first supporting means for supporting the lower limbs ends of the user, said means being associated with a rotatable transmission shaft, said first supporting means being mounted in oscillating manner relative to said main frame, and comprising a pair of footrests associated to said transmission shaft; - Second supporting means (43,44,45) for supporting the upper limbs ends of the user, said means being associated with said transmission rotatable shaft, said second supporting means being mounted in oscillating manner relative to said main frame, said second supporting means (43,44,45) comprising: - A disc rotatably mounted onto said main frame; - A pair of elongated handlebars which are mounted onto said disc in a hinged manner, and said handlebars being slidable into respective guides integral with the frame; and - A second transmission of the rotary motion of said transmission shaft to said disk, the transmission comprising a gear integral with the shaft and a chain; the arrangement being such that upon rotation of said transmission shaft a reciprocating oscillating elliptical motion of both said first supporting means and said second supporting means is generated, wherein said apparatus is adapted to move onto a surface during operation, and further comprises: - a first pair of rotatable wheels associated with a first end of said main frame, at least one wheel of said pair of wheels being connected to said transmission rotatable shaft; and - a second pair of rotatable wheels associated to a second end of said main frame, said second pair of wheels being mounted in rotatable manner onto said main frame and being connected to a handlebar, and wherein said backrest and said seat (3,31) are mounted in a movable and telescopic manner with respect to said main frame and capable of performing a vertical excursion with respect to said main frame by means of a leverage system moved by an actuator, characterized in that said seat comprises a first seat connected with said backrest, and a pair of panels hinged and slidable mounted onto a pair of brackets integral with said second frame. - Footrests as first supporting means for supporting the lower limbs ends of the user, said means being associated with a rotatable transmission shaft, said first supporting means being mounted in oscillating manner relative to said main frame, and comprising a pair of footrests associated to said transmission shaft; - Second supporting means (43,44,45) for supporting the upper limbs ends of the user, said means being associated with said transmission rotatable shaft, said second supporting means being mounted in oscillating manner relative to said main frame, said second supporting means (43,44,45) comprising: - A disc rotatably mounted onto said main frame; - A pair of elongated handlebars which are mounted onto said disc in a hinged manner, and said handlebars being slidable into respective guides integral with the frame; and - A second transmission of the rotary motion of said transmission shaft to said disk, the transmission comprising a gear integral with the shaft and a chain; the arrangement being such that upon rotation of said transmission shaft a reciprocating oscillating elliptical motion of both said first supporting means and said second supporting means is generated, wherein said apparatus is adapted to move onto a surface during operation, and further comprises: - a first pair of rotatable wheels associated with a first end of said main frame, at least one wheel of said pair of wheels being connected to said transmission rotatable shaft; and - a second pair of rotatable wheels associated to a second end of said main frame, said second pair of wheels being mounted in rotatable manner onto said main frame and being connected to a handlebar,