This paper presents an interdisciplinary design method and shows its relevance for EcoDesign. Interdisciplinary design intends to design a product considering its entire context, by the participation of various disciplines. A metaphorical level is required and built in the design process in order to involve properly all disciplines. This continuous participation of every involved discipline makes this design method fully interdisciplinary and relevant for EcoDesign. After introducing the objectives of EcoDesign and interdisciplinary design, the method of interdisciplinary design method will be detailed. This description will be useful to understand how interdisciplinary design works, and how it can be useful for EcoDesign. Finally, it will be suggested that Kansei research for design, which is at the origin of this research, can be a source of new development to improve the quality of human factors in EcoDesign.