An enclosure of electronic device includes a casing, a mounting member and a handle. The casing comprises a side plate and a limiting portion on the side plate. The mounting member is secured to the side plate and comprises a pivoting portion. The handle comprises an installing pole. The handle is engaged with the pivoting portion and is rotatable relative to the mounting member between a first position and a second position, and the limiting portion prevents the installing pole from disengaging from the pivoting portion, and prevents further rotation of the handle when the handle is in the second position.