To provide a roller bearing device with a shaft wherein a pair of roller bearings with pre-loads given to their outer rings by a compression coil spring is assembled against a shaft, and stable rotation without noise and vibration is acquired by shortening a distance to a working point of spring force from a shaft center, working pre-load force at a position near the shaft center of the outer ring, and minimizing falling of the outer ring against the shaft center.

The roller bearing device 1 with the shaft is provided with spring seats 8, 9 installed on the respective outer rings 5, 6 of a pair of the roller bearings 13, 14 arranged to face each other on the shaft 2. Outer diametrical parts 10d, 10e of the compression coil spring 10 are fitted in fitting parts 8a, 9a of the spring seats 8, 9, and arranged between the spring seats 8, 9 in a compressed state, to position in the radial direction of the compression coil spring 10, and to give the pre-load between the outer rings 5, 6.