The delamination of polyurethane (PU) laminated glass usually occurs at the interface between PU and inorganic glass. To prevent interlaminar delamination of PU and inorganic glass, PU was treated with cold plasma. The transparency of PU improved after cold plasma treatment. The cold plasma-treated PU showed 2 to 6 % higher transmittance than untreated PU. The adhesive strength of PU laminated glass increased by at least 96 % after cold plasma treatment. The adhesive strength of untreated PU samples rapidly decreased with increased hygrothermal aging time, whereas treated PU maintained almost 93 % of the original adhesive value even after hygrothermal aging for 30 days. FTIR analysis shows that -CO-O-C-, -C=O, and -CO-N groups appeared on the surface of cold plasma-treated PU, which resulted in the formation of hydrogen bonds at the interface between PU and silicate glass. After cold plasma treatment, the contact angle of PU changed from 105A degrees to 79A degrees, and the surface roughness of PU membranes changed from an average value of 19.74 to 57.16 nm.