Unfoldable modular living unit comprising one or more folding modules with a bottom, pitched roof elements (2, 3) forming the roof and the side walls, wherein each one of said modules comprises a folding and collapsible structure comprising two adjacent rigid sides or walls (1,2) hinged to each other through a hinge or a fixed knot, and a third side or wall, hinged to said first two sides or rigid walls (1, 2), wherein said third side or wall is foldable in a way that the module can be unfolded through the rotation of the rigid sides (1, 2) around said fixed hinge and by unfolding said third side, so that it assumes a prismatic shape with a substantially triangular section and, vice versa, it is possible to close the module by folding said third side towards the interior and rotating the two rigid sides (1, 2) around the fixed hinge until they are parallel to each other and side by side, assuming a substantially plane shape, wherein said module can be opened and closed in a fan shape and comprises: • a plane bottom in a substantially rectangular shape, wherein two opposing sides, i.e. the long sides, determine the width of the module, while the other two opposing sides, i.e. the short sides, determine the length of the module; • a first pitched roof element in a substantially rectangular shape, directly or indirectly hinged to a short side of said bottom through hinges positioned with their rotation axis parallel to the same short side; • at least one intermediate plane that divides the open module along its height, and wherein said intermediate plane is hinged with one of its short sides to said second pitched roof element, while it can be constrained to said first pitched roof element with the opposite side through suitable locking means, characterized in that said module also comprises: a second pitched roof element in a substantially rectangular shape hinged with one of its short sides to a short side of said first pitched roof element and with the opposite short side to the short side of said bottom, through hinges (22, 33) positioned with their rotation axis parallel to the same short sides (31, 32), and wherein said second pitched roof element can be folded, that is, it can in turn be divided along its height into at least two plane parts (34, 35) hinged to each other along hinges parallel to said short sides (31, 32); and in that said unfoldable modular living unit also comprises two opposing front and back façades (D, E). • a plane bottom in a substantially rectangular shape, wherein two opposing sides, i.e. the long sides, determine the width of the module, while the other two opposing sides, i.e. the short sides, determine the length of the module; • a first pitched roof element in a substantially rectangular shape, directly or indirectly hinged to a short side of said bottom through hinges positioned with their rotation axis parallel to the same short side; • at least one intermediate plane that divides the open module along its height, and wherein said intermediate plane is hinged with one of its short sides to said second pitched roof element, while it can be constrained to said first pitched roof element with the opposite side through suitable locking means, characterized in that said module also comprises: a second pitched roof element in a substantially rectangular shape hinged with one of its short sides to a short side of said first pitched roof element and with the opposite short side to the short side of said bottom, through hinges (22, 33) positioned with their rotation axis parallel to the same short sides (31, 32), and wherein said second pitched roof element can be folded, that is, it can in turn be divided along its height into at least two plane parts (34, 35) hinged to each other along hinges parallel to said short sides (31, 32); and in that said unfoldable modular living unit also comprises two opposing front and back façades (D, E). a second pitched roof element in a substantially rectangular shape hinged with one of its short sides to a short side of said first pitched roof element and with the opposite short side to the short side of said bottom, through hinges (22, 33) positioned with their rotation axis parallel to the same short sides (31, 32), and wherein said second pitched roof element can be folded, that is, it can in turn be divided along its height into at least two plane parts (34, 35) hinged to each other along hinges parallel to said short sides (31, 32); and in that said unfoldable modular living unit also comprises two opposing front and back façades (D, E).