An incoming City Council member who’ll soon be representing Coney Island says he’ll fight the plan to run a plastic boardwalk through the heart of the neighborhood’s fabled amusement district.

Ari Kagan, a Brooklyn Democrat replacing term-limited Mark Treyger, said he fully supports the city’s desire to renovate the long-rickety 2.7-mile Riegelmann Boardwalk running from Coney Island to Brighton Beach.

But while the city wants to replace the boardwalk’s existing hardwood with plastic planks and concrete, Kagan said he believes hardwood should be spared along a famous, roughly five block stretch of the walkway running by Luna Park, the landmark Cyclone roller coaster and other rides and attractions.

“We need to do everything possible to maintain the historical nature of the boardwalk,” said Kagan.