The invention copper relates to a pressure type fluid bearing device, and more particularly, to disperse the fluid pressure and smoothed to improve the rotational stability-axis by the shape of the spiral tree probe for generating a fluid pressure in a circumferential array, at least of at least 2 in which the fluid bearing It relates to an apparatus. The present invention therefor is fixed to the bearing bracket and said sleeve for securing the predetermined rotation center axis, the sleeve and the sleeve with the shaft inserted into the spiral tree probe form to injury the axis first dynamic pressure generating groove is formed on the outer of the shaft diameter, which is inserted in the thrust bearing and the sleeve, which is formed on the sleeve and a fluid bearing device that includes a second dynamic pressure generating groove to the shaft to rotate contact-free in the thrust generating a first dynamic pressure grooves formed in the bearing it is characterized in that it is a multi-stage arrangement on the circumference, at least two middle ear.