The purpose of the investigation reported in this paper was to study the creep effects on stress-strain-time behaviour of Mexico City lacustrine sediments. The studied site studied is localized in the Central Park, the soil specimens were obtained from 7.3 and 22.6 m depth. The paper describes the results of 8 creep tests; isotropically consolidated specimens to consolidation pressure σ^′_o=80 kPa; the creep stage caused sustained stress were applied for over 10,000 minutes. For depth 7.3 m were applied shear stress levels D=36%, 58% and 93% and for depth 22.6 m were applied shear stress levels D=22%, 37% and 56%. The test results show that the influence of creep in the destructured range (σ^′_y/σ^′_o>1) is not important at low shear stress levels, D. Creep rupture was not present in the carried out tests. The post-creep strength not clearly shows tendency to increase or decrease by comparing with reference strength before σ^′_y. The parameters shown: m, α and A.