A tool hanger is provided, including a main body, having a notch, two first pivot portions and at least one first connection portion; a base, detachably connected with the notch, the base having two second pivot portions, one of the first pivot portion and the second pivot portion including a pivot groove and the other including a pivot portion which is pivotally connected with the pivot groove, a direction about which the pivot portion rotates being defined as an axial direction, the pivot portion having a first outer diameter which is transverse to the axial direction and a second outer diameter which is transverse to the axial direction, the first outer diameter being sized greater than an opening span of the pivot groove, the second outer diameter being sized less than or equal to the opening span of the pivot groove.