Looking on the internet deeply has found these results:

I have confidence in him is the most popular phrase on the web.

I have confidence on him 154,800 results on the web	I have confidence in him 1353,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
I have confidence I can solve this case before my flight. Gentlemen, I have confidence in your ability to perform the impossible. I am showing my investors that I have confidence in my fund. I have confidence that Sgt. Hooks has chosen the appropriate music. I have confidence in his ability as a warrior. I have confidence in you, Kevin. I have confidence in Laproxil and you should too. But I have confidence, too.	I have confidence in Laproxil and you should too. It has really impressed me, and I have great confidence in him. I have a lot of confidence in him. I have confidence in you, Kevin. With this vote, I am expressing to President Jacques Santer the confidence I have in him and my confidence in the building of a strong, transparent and democratic Europe, a Europe that will know how to avoid fraud and malpractice in the future. I know things that mean I could never have confidence in him. I have confidence in his ability as a warrior. Gentlemen, I have confidence in your ability to perform the impossible.

I have confidence on him

154,800 results on the web

I have confidence in him

1353,000 results on the web

More popular!

I have confidence in Laproxil and you should too.
It has really impressed me, and I have great confidence in him.
I have a lot of confidence in him.
I have confidence in you, Kevin.
With this vote, I am expressing to President Jacques Santer the confidence I have in him and my confidence in the building of a strong, transparent and democratic Europe, a Europe that will know how to avoid fraud and malpractice in the future.
I know things that mean I could never have confidence in him.
I have confidence in his ability as a warrior.
Gentlemen, I have confidence in your ability to perform the impossible.