Schaub's decision-making has been called into question after throwing three interceptions that were returned for touchdowns in the last three matches, including a vital game-tying one in the Texans' overtime loss to the Seattle Seahawks on Sunday.
"I don't see a lack of confidence. I see some poor decision-making situations. Something that he has to handle and something that we can help him handle," ESPN quotes Kubiak as saying.
"I've been there for him when things have been really, really good and I promise I'll be there for him when they're not so good. We're there for him right now. We've got to help him work through this."
The Texans, who are now 2-2 for the season, will face the San Francisco 49ers in their next game on Sunday.