The right-back, who played in Saturday's 2-0 win over Hertha Berlin, insists everyone at the club retains their full support in the trio, who have been implicated in Scommessopoli
The Bianconeri coach, along with the centre-back and winger, form part of the 44 players and coaches targeted by FIGC prosecutor Stefano Palazzi.
Conte and Pepe stand accused of failing to report instances of match-fixing, while Bonucci has been charged with sporting fraud.
However, Juve president Andrea Agnelli vowed to stand by the trio, and the Swiss full-back is the latest to pledge his support.
"Juve are a big family and we are all with the coach, Leo [Bonucci] Simone [Pepe] and the other staff involved," Lichtsteiner said after the Old Lady's 2-0 victory over Hertha Berlin on Saturday.
"They are excellent professionals and have all of our support in this matter."
Reflecting on the friendly success in the German capital, Lichtsteiner, who started the match, noted: "It was a good test and I am satisfied with my performance and that of the team.
"I like to try other positions and it is useful for the team to have more solutions."