Harvesting by using traditional method is time consuming; it needs much labour force and result in grain loss. Importing combine harvester is too expensive and not affordable for small scale farmers. The aim of the study is to design and develop wheat crop reaper for harvesting wheat crops mainly for furrows prepared by BBM and also for traditional furrows. The designed reaper was manually driven and powered with diesel engine for cutting wheat crop stems. With the help of pulley-belt arrangement drive power is transmitted from engine to gearboxes. A spur gearbox and a bevel gearbox are used. One end of bevel gear box output shaft was connected to slider crank mechanism which converts rotary motion of shaft into reciprocating motion of cutter bar. Reciprocating cutter bar slides over fixed bar and created scissoring action between cutter blades which were responsible for cutting the wheat crop stems. Collecting mechanism consist of flat belt with collecting lugged plates bolted on it. This machine is able to run of field easily and the efforts of the farmers are reduced.