We　present　a　phase　unwrapping　approach　based　on　multiple　recording　distances　for　digital　holographic　microscopy.　It　unwrappes　the　ambiguous　phase　image　by　synthesizing　the　extracted　continuous　components　from　a　set　of　multiple　reconstructed　phase　images　obtained　from　a　series　of　holograms　by　slightly　shifting　the　specimen　longitudinally　with　a　step　more　than　the　longitudinal　correlation　length　of　the　coherent　noise　field.　The　experimental　results　demonstrate　that　the　proposed　method　provides　a　more　accurate　calculation　and　better　counteraction　of　phase　noise　than　the　methods　proposed　in　previous　research.　(C)　2015　Elsevier　B.V.　All　rights　reserved.