We perfom a large project for complex study of Blue Compact Galaxies (BCGs) with strong star formation, which includes optical spectroscopy, BVR CCD photometry and HI 21 cm radio survey. The most interesting galaxies are studied also with HST and VLA. In the frame of this project we began the study of Hα morphology of BCGs with 6-m telescope. We present and discuss here the results for the first 6 galaxies. We found the noticeable variety of forms for Hα morphology comparing to broad band images: from very compact HII region in very center of stellar body (Mark 996, possible dwarf post-merger, old galaxy experiencing strong star formation burst), to very extended gas emission encompassing the whole area traced by stars (SBS 0335-052, the most probable young galaxy in formation).

• S. I. NEIZVESTNY(Special Astrophysical Observatory RAS)
• A. YU. KNIAZEV(Special Astrophysical Observatory RAS)
• V. A. LIPOVETSKY(Special Astrophysical Observatory RAS)
• S. A. PUSTILNIK(Special Astrophysical Observatory RAS)
• A. V. UGRYUMOV(Special Astrophysical Observatory RAS)
• N. B. KORABLINA(Sternberg Astronomical Institute)
• V. N. ISAENKO(St. Petersburg University)