A sejm court () was a judicial body in Poland that existed during the First Polish Republic. The sejm court was used to "judge crimes against the nation and the king."
According to historian Edward Opalià Âski, the SejmâÂÂcourt was an "integralâÂÂpart ofâÂÂthe Parliament", with the court wielding authority over "bothâÂÂappellantâÂÂandâÂÂtryingâÂÂgravestâÂÂcrimes." However, Opalià Âski notes that the SejmâÂÂcourtâÂÂwas permitted to act "onlyâÂÂin the courseâÂÂofâÂÂparliamentaryâÂÂdebates;âÂÂafterâÂÂtheyâÂÂended,âÂÂitsâÂÂactivityâÂÂceased."
The court sat in cases of impeachment â in the words of the May 3 Constitution of 1791 (article VIII: the judicial authority) â of government "ministers [...] charged with breach of law by a deputation designated to examine their deeds [...]." The composition and functioning of sejm courts were spelled out in an act of the Sejm passed on May 13, 1791.