This article discusses how the electoral volatilityhas evolve in the Colombian Senate from 1986to 2010, concentrating in the vote share of thatvolatility that is related to the emergence andsuccess of new parties and to the weakening oftraditional parties. We offer an interpretation ofthe results according to the international literaturethat is working new parties. The source forour data is the Registraduría Nacional del EstadoCivil de Colombia.