The utility model belongs to the field of knapsacks, and particularly relates to a movement knapsack capable of carrying large balls, such as basketballs or footballs. The knapsack comprises a knapsack main body, and braces, wherein the braces are arranged on the back of the knapsack body; the knapsack also comprises a ball pocket and a skidproof liner, wherein the upper end of the ball pocket is connected with the upper part of the knapsack main body, and the lower end of the ball pocket is movably connected with the lower part of the knapsack main body; the ball pocket and the front side of the knapsack main body form a space with an adjustable volume, the skidproof liner is arranged on one side which is opposite to the front of the knapsack main body, of the ball pocket, the ball pocket is of an X-shaped structure, both ends of the upper part of the ball pocket are connected to both sides of the upper part of the knapsack main body, and both ends of the lower part of the ball pocket are connected to both sides of the lower part of the knapsack main body. According to the knapsack disclosed by the utility model, the ball pocket is arranged, so that the function that one knapsack carries movement shoes and movement clothes and large balls is realized, the movement shoes and the movement clothes can be separated from the balls, and the balls cannot pollute the movement shoes and the movement clothes; besides, the situation that the balls are not firmly fixed to slide down unexpectedly can be avoided.