We　propose　a　potentially　practical　scheme　to　generate　a　W　state　of　N　superconducting　qubits　(SQs)　placed,　respectively,　in　N　separated　transmission-line　resonators　(TLRs)　which　are　coupled　by　a　superconducting　coupler　qubit　(SCQ).　In　our　scheme,　there　is　no　need　to　apply　any　classical　driving　pulses　during　the　whole　operation　process.　The　interaction　between　the　SQs　(SCQ)　and　the　TLRs　is　resonant　and　the　strong　coupling　between　the　SQs　and　the　TLRs　can　be　readily　achieved,　as　a　consequence　the　whole　entanglement　time　is　very　short　and　we　can　obtain　a　high　fidelity.　Moreover,　by　using　a　SCQ　as　coupler　qubit,　our　scheme　can　be　controlled　and　implemented　easily　in　experiment.　The　superconducting　system　is　easy　to　be　integrated,　therefore　our　proposal　can　be　useful　in　scalable　distributed　quantum　networks.