A Brooklyn man was killed Saturday night in the city’s only recorded homicide of the blizzard when his roommate accidentally shot him, cops said.

Zdzislaw ­Golabek, 37, was fatally shot in the head when the pal was showing off his gun at around 7 p.m. and it accidentally went off, according to the police.

After an investigation, the roomie Maciej Gorecki, 32, was arrested and charged with manslaughter and criminal possession of a weapon.

Medics were called and they declared Golabeck DOA.

Andrzej Golabek, Zdzislaw’s brother, said he heard about the fatal accident through his brother’s wife, Bozena.

“My feeling was like, I can’t believe it,” said Golabek, 37, who lives in Kensington, Brooklyn. “I still can’t believe it.”

“He was really quiet,” he added. “He never got into trouble.”