| 摘要 |
PROBLEM TO BE SOLVED: To provide a bag usable as a knapsack, which can prevent a user from back-leaning to move the center of gravity backward to make the user hard to shoulder the bag and to walk when the user shoulders the bag. SOLUTION: A strap hook part 34 is equipped on the upper side of a pocket part 17 to house a shouldering strap 21 and the midway part of the shouldering strap 21 drawn out from the pocket part 17 is hung thereon. The shouldering strap 21 has effect same as placing an upper end strap connecting part 20 at the most upper part of the bag main body 2. Thus, when the user shoulders the bag 1, the user is not in a back-leaning condition, can easily shoulder the bag, feels no fatigue and uncomfortabiity by shouldering, and the bag has a good appearance and can be used for a long time.
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