A carrying assembly which may be detachably secured to a housing of an electronic device is disclosed. The carrying assembly includes a body and a positioning member. The body includes an opening and a first positioning portion positioned on a first surface of the body. The positioning member includes a second positioning portion and a top portion connected thereto. The second positioning portion detachably engages with the first positioning portion. The top portion protrudes from a second surface of the body through the opening, the second surface being opposite the first surface. When the top portion is pressed, the second positioning portion is separated from the first positioning portion, and a relative position between the body and the positioning member may be adjusted, thereby adjusting the length of the belt.