This paper reports information derived form the pollen analysis of 47 human coprolite specimens recovered during the excavation of Frightful Cave, Coahuila, Mexico. The age of the coprolites range from approximately 7,500 B.C. to A.D. 300 and are grouped into three major categories based upon their provenance in the site. The data from these 47 human coprolites are used to : (1) reconstruct prehistoric diet patterns. (2) predict specific periods of site occupancy, and (3) distinguish between economic and background pollen types. In addition, the coprolitic data are used for making limited generalization concerning possible vegetational changes in the Frightful Cave area during the past 9,500 years.