Heat transfer phenomena play a key role in industry. There are a lot of methods to increase heat transfer. One of these methods is the use of porous media. Porous media, by having pores, will increase the contact area, and it will increase heat conduction coefficient by consisting of solid phase. In this paper, a fully-developed laminar flow with convective heat transfer in a channel containing perforated porous media with constant heat flux boundary condition is considered. Using porous media in internal flows such as tubes and channels will lead to an increase in heat transfer and Nusselt number. In this investigation, the best case to increase heat transfer with logic pressure drop in a square channel is achieved. The best layout and arrangement of holes in porous media by considering a constant utilized porous media volume in channel with same depth is obtained. Symmetric modes of one-hole, 4-hole, 5-hole and 9-hole have been considered. The utilized porous media volume in each mode is constant; hence, by increasing the number of holes, the cross section radius of holes will be decreased. In addition, these mentioned modes are compared with a channel containing porous media without hole. In all modes, flow passing through porous media will lead to heat transfer and pressure drop increase compared with a flow in a pure channel. The purpose of using porous media is to create a reasonable balance between heat transfer coefficient and pressure drop so that heat transfer could be increased with a reasonable pressure drop. Regarding this issue, the performance evaluation criteria defined by PEC number is considered in addition to Nusselt number and friction factor. PEC number increase represents efficiency improvement in channels. In this project, 3 geometry variables including number of holes, the distance between holes (w*), and the ratio of holes' radiuses to each other (d*) are used. The best mode, having the maximum PEC number, is considered over porous media features including Darcy number and porosity. The results of simulation prove that it is possible to increase PEC number by utilizing a constant volume of porous media and mere the change of perforated porous media geometry arrangement. It is shown that a channel with 5-hole porous media (d * =0.58 and w*=0) is the optimized mode. Nusselt number will be increased by increase of holes' numbers because of larger contact area; however, there will be no tangible change in PEC number. Furthermore, pressure drop will be augmented by enlarging the holes' distances to each other since the major portion of fluid pass from channels' core regions. This means that pressure drop will be less by moving the holes to the center of channel and by moving them closer to walls, pressure drop will be increased. Key Words: Porous Media, Forced Convection, Laminar flow, Local Thermal Equilibrium Model, Performance Evaluation Criteria, Heat Transfer increase.