To provide a bag for a carry-on baggage with a personal computer storing sub-bag, which is constructed so that the sub-bag can be moved from the space of the bag body to the outside with the bag still closed, thereby eliminating the need of opening the bag body to remove a personal computer in checking the baggage and accurately distinguishing the baggage without obstructing X-ray checking.

In this bag with a personal computer storing bag, a separate sub-bag is attached to the bag body, the sub-bag is capable of storing a personal computer, and the sub-bag can be moved to the outside of the body.