An insurance broker who said he was playing with his bow to celebrate his birthday pleaded guilty Wednesday to charges related to shooting an arrow through a Manhattan neighbor’s glass terrace door.

Noel Luria, who had said he was using the “elegant instrument” to celebrate his 40th birthday, pleaded guilty to felony reckless endangerment, admitting he shot arrows from his fourth-floor flat.

Two arrows hit scaffolding on a building on East 80th Street across from Luria’s apartment building and one pierced Serena Fogel’s sliding glass terrace door and landed on her kitchen floor.

Luria said at the time that he had been aiming at a target block on his windowsill. A felony complaint said police found a crossbow, a compound bow and 49 arrows in Luria’s apartment. They found two more arrows in the scaffolding.

State Supreme Justice Ruth Pickholtz told Luria she will sentence him to a conditional discharge if he completes a program for alcoholics within the next 18 months and avoids getting arrested for anything.

The judge said she will let Luria withdraw his guilty plea to felony reckless endangerment and plead guilty to a misdemeanor version of the charge and then give him a conditional discharge. She set his next court appearance for Jan. 30, 2008.