We propose a metal-insulator-metal (MIM) waveguide with two detuned square ring resonators to achieve on-chip multiple plasmon-induced transparencies (PITs). PITs can be explained by a well-defined phase coupling that can be established between detuned resonances. For thirdorder detuned resonances, there is one PIT window. For second-order detuned resonances, there are one, two, or three PIT windows, depending on the detuning degree between the two square ring resonators. Electromagnetic simulation based on the finite element method is carried out to calculate the PIT transmission spectrum and electromagnetic field distribution. (C) 2015 The Japan Society of Applied Physics