Peniophora junipericola is a decayer on dead junipers (Juniperus communis). It is locally-common near the shores of the Baltic Sea. The aim of the present study was to characterise its habitat requirements by measuring the diameter of the substrate, as well as the stage of decay and the pH values of the infested twigs. Precipitation at the localities where P. junipericola is present was also taken into account. The results of the study show that the fungus can grow on thin and thick juniper branches as well as on hard, newly dead ones and on twigs more or less decayed. Most of its habitats are situated close to the sea.