We investigate the effect of nanoparticles (NPs) position on the optical parameters of organic solar cells (OSCs). We change the position of NPs inside the anode interface layer (AIL) and active layer and study the role of NPs position in light transmission, power absorption, short-circuit current density (Jsc), and maximum generation rate. We also use silver (Ag) nanoparticles inside the anode interface layer and investigate the optical parameters. Moreover, we study the role of AIL thickness in light transmission and power absorption. We use finite-different timedomain (FDTD) method for all simulations. This study can be useful for new perspectives and light management in organic solar cells.