This　paper　presents　a　comprehensive　analytical　model　for　a　Z-shaped　electrothermal　microactuator　operating　in　air　condition.　The　model　provides　the　estimate　of　the　tip　displacement　of　the　microactuator　directly　based　on　a　voltage　difference　applied　on　the　both　anchors　of　the　actuator.　In　an　attempt　to　improve　the　accuracy　of　modeling,　the　impact　of　the　shuttle　and　multiple　pairs　of　beams　are　included　in　the　model.　The　numerical　simulations　with　a　Finite　Element　(FE)　model　are　conducted　using　the　commercialized　FE　software　ANSYS　to　verify　the　analytical　model.　The　experimental　testing　is　performed　as　well　to　validate　the　analytical　model.　The　analytical　results　based　on　the　proposed　model　agree　well　with　both　the　FE　modeling　and　experimental　results.