To provide a noncontact bearing spindle device of good productivity, being compatible with a new bearing sleeve and easy to repair if damaged.

A main spindle 4 is supported by a static pressure/magnetic compound bearing or a single static pressure gas bearing 2. The static pressure gas bearing 2 has a bearing sleeve 11 fitted over the inside diameter surface of a housing 5 to form a bearing clearance d1 between the sleeve and the main spindle 4. The inside diameter surface of the bearing sleeve 11 is dimensioned and configured to form the predetermined bearing clearance d1 when the bearing sleeve 11 is fitted into the housing 5. In this case, a shrinkage fit between the bearing sleeve 11 and the housing 5 is not greater than half the desired bearing clearance. The housing 5 is made from a material having a greater coefficient of thermal expansion and a greater heat conductivity and a smaller modulus of longitudinal elasticity than the material from which the bearing sleeve 11 is made.