The Premier League defending champion suffered a 1-0 defeat to Manchester City at the Etihad Stadium, adding to losses against Bournemouth, Watford and Manchester United in the last four and a half weeks.
The Blues have consequently slipped to fifth in the top flight, sitting five points adrift of Tottenham, who occupy the last Champions League spot.
Chelsea’s toothless performance against City drew criticism, and when asked if the players are still behind head coach Antonio Conte, Giroud said: “Of course, of course. I don’t even question myself about that, so it is not a crisis.
“We played United away and City away. Obviously, we could have done better but these are not small games.
“We are not happy with that. It is not the day and the moment to question whether we are behind the boss or not. Obviously, we are behind him and sticking together.
“It is not a good weekend for us because our opponents won but we still have nine games to go. We will believe until the end. Keep the faith and some top teams will play against each other.
“We need to keep the focus on this and win the next game. Go step by step. We need momentum to reach this fourth place.”