Poly (methyl methacrylate) (PMMA) thin film (TF) was employed on TiO2 nanowires (NWs) to fabricate organic–inorganic hybrid UV photodetector (PD), and its properties were studied and compared with bare TiO2 NW-based PD. A maximum photoresponsivity of 20×10−3 A/W and a maximum external quantum efficiency of ∼3.15% were observed in the UV region at 370 nm (∼3.35 eV). Enhanced photon absorption was observed in the hybrid detector. The TF of PMMA, which is a π-conjugated polymer, increased the carrier lifetime and reduced recombination rate. The PMMA TF:TiO2 NWs hybrid UV detector shows excellent rectification, and light current/dark current ratio was measured to be ∼1.46 times in comparison to bare TiO2 NWs photodetector in the reverse bias condition from −1 to −10 V.