Machine tool for machining workpieces, comprising: - a base for supporting, in use, at least one workpiece to be machined; - a supporting structure which is movable above said base along a first axis, and which substantially extends along a second axis; - operative means (4, 5; 104) which are associated with said supporting structure and movable relative to said supporting structure along said second axis and along a third axis, which is orthogonal to said first axis and said second axis, said operative means (4, 5; 104) being configured to receive, in use, at least one tool (U, L) for machining said at least one workpiece; - a first device (6, 105) for carrying at least one tool, said first device (6, 105) being relatively movable relative to said operative means (4, 5; 104) between a respective resting position, where said first device (6, 105) is at a predetermined distance from said operative means (4, 5; 104), and a respective operative position, where said first device (6, 105) is placed in such a way as to allow the exchanging of at least one tool between said first device (6, 105) and said operative means (4, 5; 104); characterized in that said first device (6, 105) is movable from the respective resting position to the respective operative position by a translation along said second axis; and - a second device (13, 103) for carrying at least one tool, said second device (13, 103) being movable relative to said supporting structure between a respective resting position, where said second device (13, 103) is at a predetermined distance from said operative means (4, 5; 104), and a respective operative position, where said second device (13, 103) is placed in such a way as to allow the exchanging of at least one tool between said second device (13, 103) and said operative means (4, 5; 104); wherein said first device (6, 105) in the respective resting position and said second device (13, 103) in the respective resting position are above each other. - a base for supporting, in use, at least one workpiece to be machined; - a supporting structure which is movable above said base along a first axis, and which substantially extends along a second axis; - operative means (4, 5; 104) which are associated with said supporting structure and movable relative to said supporting structure along said second axis and along a third axis, which is orthogonal to said first axis and said second axis, said operative means (4, 5; 104) being configured to receive, in use, at least one tool (U, L) for machining said at least one workpiece; - a first device (6, 105) for carrying at least one tool, said first device (6, 105) being relatively movable relative to said operative means (4, 5; 104) between a respective resting position, where said first device (6, 105) is at a predetermined distance from said operative means (4, 5; 104), and a respective operative position, where said first device (6, 105) is placed in such a way as to allow the exchanging of at least one tool between said first device (6, 105) and said operative means (4, 5; 104); characterized in that said first device (6, 105) is movable from the respective resting position to the respective operative position by a translation along said second axis; and - a second device (13, 103) for carrying at least one tool, said second device (13, 103) being movable relative to said supporting structure between a respective resting position, where said second device (13, 103) is at a predetermined distance from said operative means (4, 5; 104), and a respective operative position, where said second device (13, 103) is placed in such a way as to allow the exchanging of at least one tool between said second device (13, 103) and said operative means (4, 5; 104);