Search for Physics Beyond Standard Model at HERA

The latest status of searches at HERA for physics beyond the Standard Model is summarized on behalf of the H1 and ZEUS collaborations. Emphasis is put on production of resonant particles accessible within the HERA center-of-mass energy, such as leptoquarks, squarks in R-parity-violating supersymmetry or excited fermions. Most of the results presented here are based on the full available statistics of positron-proton collisions, and also preliminary results from very recent electron-proton running are presented. Results which have been updated since this Ringberg '99 Workshop are also included.