Photoelectric conversion efficiency of a dye-sensitized solar cell was improved by trapping more light into the absorbing region using Ag nanoparticle. Improved light transmission is observed experimentally in silver nanoparticle coated FTO glass. The size of Ag nanoparticle is estimated as 110 nm by comparing theoretical results with experimental data. The transmission data is used to explore the effect on electrical parameters of dye-sensitized solar cell using theoretical model. Plasmon enhanced DSSC showed increased efficiency of 11.76% under AM1.5 solar spectrum compared with 10.86% for a DSSC without Ag nanoparticles.