In this study, we make a consideration on an evaluation of indoor atomosphere, paying attention to the relationship between the color of furniture and the evaluation of indoor comfortableness. Concretely, the difference of evaluation caused by color of curtain, bedspread, ceiling and walls in bedroom is examined with scale model. There are one bed, two curtains of window, a pair of armchairs with table in 1/10 scale model bedroom. One color of wall and 28 kinds of cloth for bedspread and curtain are used. There are 39 human subjects. All results are discussed with Semantic Differential Method and Factor Analysis. The 28 colors of cloth are classified 4 groups from viewpoint of comfortable. There is close relation between the indoor comfortableness and the color (Munsell system hue, value and chroma) of furniture. The combination of high value and low chroma of color makes most comfortable evaluation. But the combination of high value and high chroma of color makes uncomfortable evaluation. The factor analysis extracted three factors : comfotable factor, active factor and style factor. These results give us a guideline of color conditioning of rooms for our comfortable indoor life. And we also have a future problem to resolve by more precise experiments.