Machine tool

A machine tool is provided with: a base (11); the stand column (21) is vertically arranged on the base (11); a saddle (31) which is a moving body supported by the column (21); and a tool spindle (91) that is supported by the saddle (31) and that rotates the tool about a rotation center axis (110) extending in a Z-axis direction parallel to the horizontal direction. The saddle (31) has a frame section (211) provided so as to surround the tool spindle (91). The thickness of the frame section (211) in the Z-axis direction varies in the Y-axis direction parallel to the vertical direction, and is maximum at a first position (Pa) close to the upper end section (221) of the frame section (211) rather than the lower end section (222) of the frame section (211). 机床具备：基座(11)；立柱(21)，其竖立设置于基座(11)上；床鞍(31)，其是由立柱(21)支承的移动体；以及刀具主轴(91)，其由床鞍(31)支承，使刀具以在与水平方向平行的Z轴方向上延伸的旋转中心轴线(110)为中心旋转。床鞍(31)具有以包围刀具主轴(91)的方式设置的框架部(211)。框架部(211)的Z轴方向上的厚度沿着与铅垂方向平行的Y轴方向变化，在靠近框架部(211)的上端部(221)而不是靠近框架部(211)的下端部(222)的第1位置(Pa)处最大。