To enable the inner rings on both sides to be prevented from being separated from each other by a simple configuration to improve the productivity to reduce the manufacturing cost.

This full roller type cylindrical roller bearing 4 for crane sheaves, is a double row bearing, and is provided with two inner rings 6, 6 divided for every roller row, and an integral outer ring 7 having raceway surfaces 7a, 7a on both roller rows. The respective inner rings 6 have collars 6a, 6a on both sides. The outer ring 7 has a collar 7b in its center. Snap ring fitting grooves 7c are formed on the inside diameter surface adjacent to the roller end sides on both the raceway surfaces 7a, 7a. Roller stop snap rings 9 are provided respectively in the snap ring fitting grooves 7c.