Cops have collared a suspect who allegedly stabbed another man to death inside a Brooklyn tobacco shop over poor manners, police sources told The Post.

Edwin Pedroza, 42, was arrested Friday in connection to the fatal incident at 4th Ave. Tobacco Road Corp near President Street in Gowanus on Sept. 20, police confirmed

Cops charged him with manslaughter and criminal possession of a weapon, according to cops. 

Pedroza allegedly stabbed Joan Nunez last month after he held the door for the 37-year-old but didn’t get a “thank you,” police sources said at the time.

Cops identified Pedroza in the days after the stabbing.