Hydroxyapatite　(HA)　coatings　were　deposited　onto　Ti6Al4V　substrate　by　microplasma　spraying　(MPS)　in　the　current　research.　The　morphology,　phase　compositions,　and　percentage　of　crystallinity　of　the　coatings　were　characterized　by　means　of　scanning　electron　microscopy　(SEM)　and　X-ray　diffraction.　An　in　vitro　evaluation　by　soaking　the　coatings　in　simulated　body　fluid　(SBF)　for　up　to　14　days　was　conducted　aiming　at　the　evaluation　of　their　bioactivity.　Results　from　the　present　investigation　suggest　that　microplasma　sprayed　HA　coatings　exhibited　certain　roughness,　pores,　and　microcracks.　Thermal　decomposition　existed　in　the　coatings　where　HA,　alpha-TCP,　beta-TCP,　amorphous　phases,　and　CaO-exclusive　impurities　were　observed.　The　in　vitro　test　indicated　that　HA　coatings　deposited　by　MPS　possessed　better　bioactivity　and　stability.　A　layer　of　carbonate-apatite　covered　most　of　the　coating　surface,　which　did　not　exhibit　significant　spalling　after　incubation　in　SBF.