This project deals with the modeling and analysis of spur gear with an involute profile. The involute gear profile is the most commonly used system for gearing today. In an involute gear, the profiles of the teeth are involutes of a circle. In involute gear design contact between a pair of gear teeth occurs at a single instantaneous line. Rotation of the gears causes the location of this contact line to move across the respective tooth surfaces. The project mainly deals with modeling of spur gear with the help of CATIA, the analysis was done in the ANSYS software and prototype was done on the 3D Printer.The spur gear with involute profile was modeled with the help of CATIA. This model was imported into ANSYS with IGES file format for analysis. In this two types of analysis was done. One is model and the other is static analysis. All the results were tabulated. By using the features of CATIA, the model was saved in the form of .stl (stereolithography) for 3D Printing; the file was imported in QURA software. QURA will generate the g-code which was used to print the component in 3D.