Faced with new and more serious accusations of inappropriate behavior by the Iowa State men's basketball coach, Larry Eustachy, the university's athletic director recommended yesterday that Eustachy be fired. Eustachy, who was suspended with pay from his $1.1 million job, has five days to appeal to the university president's office.

Eustachy, a popular and charismatic figure who is also Iowa's highest salaried public employee, has spent the last several days trying to explain himself over his conduct at two student parties after Iowa State games in the past two seasons. The Des Moines Register published photographs on Monday showing Eustachy kissing or being kissed by women and Eustachy holding a can of beer at a party in Columbia, Mo., on Jan. 22, more than four hours after his team lost to Missouri in a Big 12 Conference game.

Then on Tuesday, The Maneater, the student newspaper of the University of Missouri, published an article in which a Missouri student said that Eustachy had propositioned women at that party. The newspaper said a drunken Eustachy had to be helped to a taxi as he left at 5 a.m.

The Des Moines Register also reported that Eustachy was at a late-night fraternity party in Manhattan, Kan., on Jan. 19, 2002, after a game against Kansas State.

The Register quoted students attending each of the parties as saying that Eustachy had criticized his own players to groups of students.

Yesterday morning, accompanied by his wife, Stacy, Eustachy held a news conference in Ames, Iowa, during which he said he had recently begun treatment for alcoholism. He did not say whether he planned to contest the recommendation by the athletic director, Bruce Van De Velde, but he did indicate he would not leave voluntarily.

''I don't think I'll ever be able to apologize enough,'' said Eustachy, who is under contract with Iowa State until 2011. ''I have no excuses for my behavior.''

The events of the past week represent a swift and inglorious descent in the 47-year-old Eustachy's tenure at Iowa State. Just two years ago, after his name surfaced for various vacant head coaching jobs, including the post eventually filled by Rick Pitino at Louisville, Eustachy's contract was renegotiated by Iowa State for the second consecutive season. He received a raise that placed him among the elite in college basketball coaching circles.

Even as Iowa State was cutting varsity sports because of budget constraints, Eustachy and his million-dollar annual salary had not been a target for criticism. In 2000, he was the national coach of the year after leading Iowa State to the regional finals of the N.C.A.A. tournament.

Iowa State had won consecutive regular-season titles in the Big 12. In the 1999-2000 and 2000-1 seasons, no Division I team in the country won as many games as Iowa State, which had a 57-6 record.

Iowa State went 12-19 in 2001-2, Eustachy's first losing season as a college head coach. Last season, the Cyclones were 17-14. They finished ninth in the Big 12 with a 5-11 record and have lost their last 17 conference road games.

The accusations against Eustachy are not the only recent problems of the basketball team. Randy Brown, one of Eustachy's assistant coaches, resigned after being charged with violating federal laws against child pornography. Center Jared Homan, a sophomore, was charged with public intoxication after he was found lying on a sidewalk in downtown Ames on March 28, the police reported. On Feb. 23, forward Clint Varley was charged with drunken driving. Varley, a backup, was suspended indefinitely from the team.

Van De Velde said he had received additional reports on Eustachy's behavior but declined to elaborate.

''Coach Eustachy has himself admitted he exercised very poor judgment that resulted in profound embarrassment to the men's basketball program, the athletic department, the university and the larger Cyclone family,'' Van De Velde said yesterday. ''I cannot and I do not condone Coach Eustachy's behavior.''

At his news conference, Eustachy admitted to episodes of ''extreme poor judgment.'' Asked if he was referring to more than the two reported incidents, he replied, ''Yes.''

Stacy Eustachy defended her husband. ''He stepped up to the plate and made himself accountable,'' she said. On Tuesday, Iowa State players met with Van De Velde and pleaded for Eustachy to be retained as head coach. Several players have threatened to transfer if he is fired.

David Fisher, a member of the Iowa Board of Regents, said yesterday that he supported the recommendation to dismiss Eustachy. The Board of Regents does not hire coaches at Iowa's five public universities, but it appoints the president or superintendent at each of the campuses and helps set policies.

''You can't hide behind a beer bottle,'' Fisher said. ''If we don't fire him, it's going to have a devastating effect at the box office.''

Van De Velde said Eustachy had five days to request a hearing before Tahira Hira, an executive assistant to the Iowa State president, Gregory Geoffroy. If Eustachy requests the hearing, Van De Velde said, Hira will determine if just cause exists to fire him.

If Hira rules against Eustachy, he can then appeal directly to the Iowa State president. A spokesman for the Board of Regents said Eustachy may also appeal there.

Photos: Larry Eustachy, at a news conference yesterday with his wife, Stacy, was national coach of the year in 2000 and in demand. (Associated Press)(pg. D1); Larry Eustachy said yesterday that he has an alcohol problem. (Associated Press)(pg. D2)