Nowadays, the ecosystems of natural environment are loaded with great number of polutants. One of them which is becoming increasily hazardous is microplastic. Microplastics are plastic substances within the size range of 1 to 5 mm. They can be manufactured as intended inputs to hygiene products or derive from larger plastic compounds. Their main danger rely on size scope which make them practically inconspicuous. Futhermore, microplastic particles are able to absorb high amount of contaminants as heavy metals or organic polutants. In our study, we operated experiments on soil from the show cave in order to detect and quantify the microplastic particles.