The present invention relates to a machine tool which has the following: a machine bed 10 which is supported on machine feet 3, 3a and is formed from a supporting structure of ribs which are connectedto one another, wherein two guide rails 1 are arranged on the top side, on opposite outer sides of the machine bed 10, and a machine table 2 is provided between the two guide rails 1, wherein first main ribs 11 are provided on either side of the machine bed 10, the profile of the said first main ribs, in cross section of the machine bed 10, beginning below the guide rails 1 and extending obliquely inwards in the machine bed 10 to external machine feet 3a in order to introduce loads, which act on the guide rails 1, into the machine feet 3, 3a.