The ADMER is a model for predicting wide area atmospheric concentration distribution and exposed population distribution of chemical substances. In a year since its first publication of ADMER Ver. 1.0, for the nation-wide coverage, the software has been utilized already by 1,000 or more clients. It is one of the most popular software of this kind in Japan. An English Version and a Revised Edition of ADMER have been developed. The software and user manual will be provided free of charge from January 6, 2005.