Machine tool

A machine tool comprising:

• a table movable in a first axial direction parallel to a horizontal direction;
• a first guide portion and a second guide portion that guide the table in the first axial direction and are arranged apart from each other in a second axial direction which is parallel to the horizontal direction and orthogonal to the first axis;
• and
• a bed including a first guide mounting portion and a second guide mounting portion on which the first guide portion and the second guide portion are mounted respectively, the bed being provided with an opening portion which is located between the first guide mounting portion and the second guide mounting portion and penetrates in a third axial direction parallel to a vertical direction, wherein the first guide mounting portion and the second guide mounting portion include a first facing surface and a second facing surface that face each other across the opening portion in the second axial direction, and the bed further includes a rib portion which is arranged in the opening portion and is connected to the first facing surface and the second facing surface.