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In our previous work1 we found that two optical cavity modes indirectly coupled through a common quantum mechanical resonator can establish inter-cavity dynamic entanglement(measured by negativity)over time when they are closely resonant with the resonator.Extending this optical model to superconducting circuits,we recently consider two delocalized superconducting two-level qubits,each of which is coupled to a common stripline resonator mode3.We find that the delocalized qubits would similarly establish entanglement(this time,measured by bipartite and tripartite concurrence)over time: that is,an exponential envelop of rising concurrence from initiation to a certain moment where a saturated value is reached.