This study concerns hypotension as a basic parameter of the suckling process in the calf. A total of 696 calves were examined. Statistical calculations of the least sguares method according to W.P. Harvey (1987). In the cognitive aspect of this study the offect of some selected specific traits of the calves on the maximum walue of hypotension during sukling. However in the utilitarian aspect the study results were referred to the technique of mechanical milking.