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 (X), and which substantially extends along a second axis (Y); - operative means (4, 5; 104) which are associated with said supporting structure and movable relative to said supporting structure along said second axis (Y) and along a third axis (Z), which is orthogonal to said first axis (X) and said second axis (Y), 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 for carrying at least one tool (U), said first device being relatively movable relative to said operative means (4, 5; 104) between a respective resting position, where said first device is at a predetermined distance from said operative means (4, 5; 104), and a respective operative position, where said first device is placed in such a way as to allow the exchanging of at least one tool (U) between said first device and said operative means (4, 5; 104); characterized in that said first device is movable from the respective resting position to the respective operative position by a translation along said second axis (Y); and - a second device for carrying at least one tool (L), said second device being movable relative to said supporting structure between a respective resting position, where said second device is at a predetermined distance from said operative means (4, 5; 104), and a respective operative position, where said second device is placed in such a way as to allow the exchanging of at least one tool (L) between said second device and said operative means (4, 5; 104); wherein said first device in the respective resting position and said second device 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 (X), and which substantially extends along a second axis (Y); - operative means (4, 5; 104) which are associated with said supporting structure and movable relative to said supporting structure along said second axis (Y) and along a third axis (Z), which is orthogonal to said first axis (X) and said second axis (Y), 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 for carrying at least one tool (U), said first device being relatively movable relative to said operative means (4, 5; 104) between a respective resting position, where said first device is at a predetermined distance from said operative means (4, 5; 104), and a respective operative position, where said first device is placed in such a way as to allow the exchanging of at least one tool (U) between said first device and said operative means (4, 5; 104); characterized in that said first device is movable from the respective resting position to the respective operative position by a translation along said second axis (Y); and - a second device for carrying at least one tool (L), said second device being movable relative to said supporting structure between a respective resting position, where said second device is at a predetermined distance from said operative means (4, 5; 104), and a respective operative position, where said second device is placed in such a way as to allow the exchanging of at least one tool (L) between said second device and said operative means (4, 5; 104); <EOS>