This paper presents a study on conceptual design of a 180-seater medium range passenger aircraft. The main purpose is to understand the importance of aircraft design, the steps involved, and the parameters considered in designing an aircraft with specified mission. The design point is considered by historical data of similar range aircraft- by comparing their weights, powerplants used, cruising altitude and speed, service ceiling, and geometrical dimensions of aircraft body. The aircraft will possess a low wing, tricycle landing gear, and a conventional tail arrangement. After the design calculations are complete, the geometry of the aircraft is generated using CATIA V5R20.