Kiselichka Cave near Delchevo, was investigated within the framework of a project dedicated to investigating Paeonia and the Paeonian society. It is in a remote mountainous area above small creek, at 766 m elevation. After preliminary survey in 2016, when pottery was found inside the cave, test excavations on an area of 2 m2 in the center of the first chamber were caried out in the summer of 2017. In a 0,6 m thick sediment between the modern surface and the bedrock, two archaeological layers were identified containing various features and artefacts. The lower layer is dated to the transition from the Bronze towards the Iron Age and associated to it are the remains of a floor structure of beaten clay with three renewal phases. From the same period is also one of the four pits discovered within the trench limits. The upper layer is from the Late Antiquity, although the numerous violations of the prehistoric layer at that time left a mixed assemblage of prehistoric and Roman pottery. Part of the Late Antiquity layer are the remaining three pits.