Confirmation of 15 promissory Lines of Common Sean (Phaseolus vulgaris L.), of export in the First floor May San Martín has as objectives: To select experimental lines of bean in confirmation rehearsal with grain types required by the interna! and externa! market, of good yield potential under the conditions agroecológicas of the First floor May and to Carry out the economic analysis of the best treatments by means of the relationship benefits cost. The investigation work was taken 1 end up in the lands of the Experimental Station The Future", to 14,50 Km. of the city of Tarapoto, south highway Fernando Belaúnde Terry, in a period of 3 months. Located geographically: South latitude 06°30', Longitude west of 76°19' and an Altitude 230 m.s.n.m.m. political Location: Place E.E. El Porvenir", District of Juan Guerra, County and Region San Martín. A Design of Complete Blocks was used at...