Cops are hunting for a serial attacker who has targeted Asian women in Manhattan — bashing them with a hard object he keeps in a plastic bag, police said.

The latest victim, 41, was inside a Chinatown dry cleaners where she works at 48 Mulberry St. around 4 p.m. Monday when the sicko walked up to her and asked if he could get his clothes dry cleaned there, cop sources and witnesses said.

When she ignored him and he left, she called 911, possibly recognizing him as the assailant in previous attacks, police sources said.

He returned shortly after and told her, “I don’t appreciate the way you’re talking to me,” as he played with an unidentified object wrapped in a gray plastic bag in his hand, police sources said.

The woman then ordered the man to leave and that’s when he held up a perverted message on his cell phone in Catonese before he whacked her in the face with the heavy object and fled, cops said.

“There were bruises on the right side of her mouth and blood on the counter,” said Ahung Choo, 50, the woman’s co-worker at the Paragon Cleaners, who witnessed the attack that sent the Bensonhurst, Brooklyn resident to New York Downtown Hospital,

“Everyone is afraid that there’s not much they can do,” said a horrified Choo, speaking through a translator.

The assaults began Wednesday when the fiend struck two women in the face in separate incidents, using the same weapon, cops said.

The first was on Grand Street near Lafayette Street in Little Italy around 4:15 p.m.where police say he also tried to strike up conservation with a 35-year-old woman.

He walked off but returned moments later and clobbered her on the chin, cops said.

Four hours later he attacked a 29-year-old woman walking down Park Avenue in Midtown.

Another victim, 34, was hit on Friday at Second Avenue and East 60thStreet on the Upper East Side where she was hit in the forehead by the suspect at around 12:25 a.m., cops said.

The series of attacks has left area Asian women on edge.

“It could have easily just as been me and it’s a little unnerving,” said Jennifer Sharkey, 36, the owner of Sharkey’s Cafe just next door to the dry cleaners where the woman was bashed.

Sharkey has posted a sign in front of her cafe that reads: “Violence against women is everyone’s problem. Stay safe.”

Police have released surveillance video and photos of the creep in the hopes of nabbing him.

A man thought that he spotted the fiend at the corner of East Houston Street and Avenue B at around 11 a.m., sparking a large police response with officers combing the area holding photos of the suspect’s face, police said.

The suspect was last seen wearing a blue-and-white striped shirt.

Anyone with information about any of the attacks should call the NYPD’s Crime Stoppers Hotline at 800-577-TIPS.