Chelsea striker Costa was on fire during the first half of the season scoring 14 league goals in 18 appearances.
But since the turn of the year his ratio has slowed significantly to three in 10.
Costa’s 2017 has also been disrupted by a January training ground row with Conte and following mega-money interest in him from China.
Conte said: “No, I’m not concerned about this, his form. It can happen. For me, the most important thing is he is showing me great commitment and behaviour during the games, and is doing what I want.
“He was also unlucky in a lot of circumstances. But a player like Diego Costa can score in every game, and I’m sure he can do this.”
Conte was adamant Costa still brings plenty to the table when he is not scoring.
“His experience. His character. His personality. That’s very important for us and the team. Also, Diego won in the past and he has good experience,” Conte said.
“The goals are very important for the forwards. I think he knows that, for us, he’s an important player if he is scoring or if he isn’t. He must continue with his commitment and then I’m sure he’ll score.
“I don’t think I need to say anything to him to keep his confidence up. I speak with all my players and, if I’m not happy with someone’s commitment or behaviour, then I would speak to him.
“But if he’s not scoring? I repeat. He’s playing good football and doing what I want.”