The　nanofluid　model　containing　microorganisms　over　a　rotating　disk　with　power-law　stretching　is　constructed　in　this　paper.　The　combined　effects　of　nanoparticles　and　microorganisms　in　nanofluid　are　investigated　by　solving　the　governing　equations　numerically.　The　numerical　solutions　of　the　skin　friction　coefficient　and　local　Nusselt　number　are　in　agreement　with　the　corresponding　previously　published　results.　The　quantities　of　physical　interest　are　graphically　presented　and　discussed　in　detail.　It　is　found　that　the　power-law　stretching　index　has　produced　profound　influence　on　the　flow　as　well　as　the　heat　and　mass　transfer.　©　2017　Wiley　Periodicals,　Inc.