Double row ball bearing and shaft support device

A double row ball bearing comprising:

• an outer ring;
• an inner ring;
• a plurality of first balls disposed between the outer ring and the inner ring to form a first ball row;
• a plurality of second balls disposed between the outer ring and the inner ring to form a second ball row having a pitch circle diameter larger than a pitch circle diameter of the first ball row;
• a first cage in an annular shape, the first cage having a plurality of first pockets in which the first balls are held;
• a second cage in an annular shape, the second cage having a plurality of second pockets in which the second balls are held;
• and
• an annular portion that covers, together with the outer ring, the entirety of a portion of each of the second balls held in the second pockets from a radially outside, the portion being exposed on an outside of the second pocket and oriented radially outward,
• wherein an axially outer end surface of the annular portion is located at an axial position within a range from an axially outer end surface of an outer annular portion of the second cage to an axially inner end surface of the outer annular portion of the second cage in an axial direction.