In　this　paper,　the　modal　and　finite　analysis　of　a　rotating　piezoelectric　beam　are　studied　by　considering　electromechanical　coupling.　The　differential　equations　governing　two　transverse　vibrations　are　derived　by　the　extended　Hamilton　principle,　wherein　an　additional　piezoelectric　coupling　term　is　present　in　two　transverse　planes　in　contrast　to　the　traditional　models　of　rotating　beam.　The　ordinary　differential　equations　are　investigated　by　using　Galerkin　method.　The　nature　frequency　and　complex　mode　are　obtained　by　solving　the　standard　eigenvalue　problems　of　the　gyroscopic　system.　It　shows　that　the　rotating　speed　makes　the　frequency　of　system　split　into　two　parts.　The　forward　and　backward　nature　frequency　and　complex　mode　of　the　rotating　piezoelectric　beam　are　discussed.　For　natural　vibration　of　a　rotating　piezoelectric　beam,　the　gyroscopic　effect　is　studied　during　modal　motions　in　this　study.　Further,　the　finite　analysis　of　a　rotating　beam　is　investigated　to　compare　with　the　results　of　numerical　simulation.　The　modal　motions　described　the　forward　and　backward　processions.　©　25th　International　Congress　on　Sound　and　Vibration　2018,　ICSV　2018:　Hiroshima　Calling.　All　rights　reserved.