In previous experiments about the possibilities to produce thermal insulation material from coniferous greenery (needles and thin branches) made by authors of this research, it was found that there is not enough natural resin in coniferous greenery to make sufficiently strong thermal insulation material plates. Therefore it is necessary to add some binder. Potato starch glue was selected as natural and environmentally friendly binder. For that reason the aim of the experiments in this study is to evaluate if the quantity of potato starch binder influences thermal conductivity coefficient of coniferous needle thermal insulation material. In this study two experiments were performed investigating two factors – proportion of the binder and coniferous species (pine or spruce). In the first experiment melted fresh coniferous greenery with potato starch binder was used. In the second experiment potato starch was used to band dried needles without wood parts. Granulometric content for raw materials was determined in both cases. Total of 14 different samples were prepared and tested in this study, for all of them thermal conductivity coefficient was determined in laboratory conditions. The results are compared with thermal conductivity coefficients of other thermal insulation materials. The possibility to use produced coniferous material as thermal insulation material are evaluated.