The presented paper shows some possible ways for alteration of membrane pro
perties. The used method of plasma treatment allows to tailor membranes acc
ording to a particular demand. The action of plasma on porous membranes res
ults in polymer ablation tan increase of pore diameter), deposition of poly
mer layer (plugging of pore lumen) and/or rebuilding of surface functional
groups. These effects place plasma treatment among the most versatile modif
ication methods. Having in stock one ultrafiltration membrane one is able t
o obtain various micro-, ultra, and nanofilters, some membranes designated
for immobilization of biological components, hydrophobic membrane for membr
ane distillation, or gel-like membranes for dialysis. Several possible ways
of that modification are presented in the paper.