During 7 seasons great snipe lek behavior was studied in west-central Sweden. General information about the lek and the males visiting, plus an account of the drumming display are given. A territorial system is established on the lek. Territories are not fixed between years. Territorial behavior as intimidating, fighting and chasing is described. Chasing predominates when a female arrives for mating late in the evening. Courtship behavior and copulation were observed. The social organization at the lek is described. Two groups of males are identified, territorial and non-territorial males. One difference used to separate these groups of males is the attendance to the lek. The non-territorials spend much shorter time at the lek. There is also a difference in attendance within the group of non-territorials suggesting one group being birds on migration. All copulations observed were performed by the territorial males known to be oldest.