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(Dipropylmorpholinoacetamido)-26, 28-dihydroxycalix [4] arene was used as a chemical sensor material in this work. The calix [4] arene LB thin films were prepared onto a gold-coated glass and quartz glass substrates to fabricate a thin film chemical sensor element. Atomic Force Microscopy (AFM) and Surface Plasmon Resonance (SPR) techniques were used to characterize all the calix [4] arene LB thin films. The film thickness and the refractive index of thin films can be evaluated with the fitted experimental SPR datas. The refractive index and the thickness per monolayer of LB films were determined as a 1.58±0.04 and 1.27±0.09 nm, respectively. The calix [4] arene LB thin film chemical sensor element was exposed to dichloromethane, chloroform, benzene and toluene vapors. The SPR kinetic measurements displayed that, the photodetector response change, ΔIrf for saturated dichloromethane vapor is much …