What a sucker.

An NYPD detective has been accused of tackling a woman in a Brooklyn apartment and injuring her knee because he thought she was carrying drugs — though she really just had a lollipop.

Detective Sekou Bourne — who had earlier been accused of slugging a teenager who he mistakenly thought had pot — allegedly injured Jarnale Henry in her East New York apartment in April 2013.

The officer was doing a sweep of the building looking for drug dealers when Henry came to her door and asked, “What do you want?,” according to testimony at his Civilian Complaint Review Board hearing.

Bourne allegedly tackled her, only to find out she was just holding a big sucker.

“He pushed me down … They knocked my lollipop to the ground. I fell on my leg, onto my whole right side,” Henry told The Post after the hearing. She was not charged with a crime.

Bourne is also under investigation on separate allegations that he knocked 17-year-old Marcel Hamer out cold last June because he thought the teen was smoking pot. The encounter in Clinton Hill was caught on video.

“Mister, it was just a cigarette, sir,” someone can be heard saying.

At Monday’s hearing, Bourne admitted the woman had only a lollipop, but said the way she asked “What do you need?” indicated she was selling drugs.

“I thought it was a drug-related question. I thought she was asking me if I needed any drugs,” Bourne told the CCRB.

“That’s when I identified myself as a police officer.”

He also said he didn’t tackle her, she tripped.

“She tripped and fell on her own. Then I got on top of her and began frisking her for my safety,” he said.