UNEP-IETC started new program of transferring Environmental Sound Technologies, ESTs since 1994.This programme includes three parts, (1) development of data base on ESTs, (2) promotion of transferring ESTs to developing countries and countries with economies in transition, and (3) dissemination of environmental management system to the countries. Authors took part in sub-programme of promotion of transferring ESTs.In the programme, needs of ESTs in developing countries were identified, model training programme of transferring ESTs was developed, model training course was implemented and examined, and regional training course was implemented in order to disseminate ESTs.These researches and activities are based on the concepts of technology transfer and capacity building stated in Agenda 21.In this paper, basic ideas of the sub-programme of transferring ESTs are introduced and the training needs on ESTs identified through questionnaire survey and references are discussed.