A convertible object-holder device comprising: - a support structure having a front surface; - a lining, which is foldable and is coupled in fixed positions to coupling areas (14,15) of said support structure; said lining comprising: a) a cover portion facing said front surface; b) two folding portions (29,30) arranged on opposite sides of said cover portion in positions adjacent, respectively, to said coupling areas (14, 15) and defining respective virtual hinges about respective folding axes (31,32), to allow a user to move said cover portion with respect to said support structure; - elastically deformable means, which are associated with said cover portion and are bistable so as to take on two different configurations, corresponding respectively to: a) a first operating condition, wherein said cover portion is spaced from said front surface, so as to define an object-holder compartment, and has an opening which allows the user to access said object-holder compartment, and b) a second operating condition, wherein said cover portion is substantially lying on said front surface; said cover portion comprising a door, which is movable with respect to the remaining part of said lining so as to open and close said opening; characterised in that said cover portion further comprises: - an intermediate area defining a virtual hinge about a further folding axis; - a first and a second area (24,25), which are arranged on opposite sides of said intermediate area and are substantially flat and transverse to each other in the first and second operating conditions. - a support structure having a front surface; - a lining, which is foldable and is coupled in fixed positions to coupling areas (14,15) of said support structure; said lining comprising: a) a cover portion facing said front surface; b) two folding portions (29,30) arranged on opposite sides of said cover portion in positions adjacent, respectively, to said coupling areas (14, 15) and defining respective virtual hinges about respective folding axes (31,32), to allow a user to move said cover portion with respect to said support structure; a) a cover portion facing said front surface; b) two folding portions (29,30) arranged on opposite sides of said cover portion in positions adjacent, respectively, to said coupling areas (14, 15) and defining respective virtual hinges about respective folding axes (31,32), to allow a user to move said cover portion with respect to said support structure; - elastically deformable means, which are associated with said cover portion and are bistable so as to take on two different configurations, corresponding respectively to: a) a first operating condition, wherein said cover portion is spaced from said front surface, so as to define an object-holder compartment, and has an opening which allows the user to access said object-holder compartment, and b) a second operating condition, wherein said cover portion is substantially lying on said front surface; a) a first operating condition, wherein said cover portion is spaced from said front surface, so as to define an object-holder compartment, and has an opening which allows the user to access said object-holder compartment, and b) a second operating condition, wherein said cover portion is substantially lying on said front surface; - an intermediate area defining a virtual hinge about a further folding axis; - a first and a second area (24,25), which are arranged on opposite sides of said intermediate area and are substantially flat and transverse to each other in the first and second operating conditions.