An endless belt includes either a single-layer body including a layer including an imide resin and conductive particles, or a multilayer body including the layer as an outermost layer. The ratio y/x of the layer is 0.8992 or more and 1.0157 or less, where x [log Ω/□] is the common logarithm of the surface resistivity of the outer peripheral surface of the layer measured with a ring probe when a voltage of 100 V is applied to the layer for 3 seconds at a load of 1 kg, and y [log Ω·cm] is the common logarithm of the volume resistivity of the layer measured with a ring probe when a voltage of 100 V is applied to the layer for 5 seconds at a load of 1 kg.