In March 2017, Bihr was called up to the
Thailand national team for the first time under the leadership of coach
Kiatisuk. This was when the Thai team was preparing for the match against
Saudi Arabia in the 2018 World Cup qualifiers. However Bihr was dropped due to a sudden injury. In August 2017, Bihr was again included in the squad to prepare for matches against Iraq and Australia, also in the
2018 World Cup qualifiers. However, he was not fielded by coach
Milovan Rajevac. In October 2017, Bihr was called up to play in a friendly match against
Kenya and made his debut for Thailand in the starting lineup. In March 2018, Bihr was called up to prepare for the
2018 King's Cup, but not listed in the final squad. In 2021, he was called up by Thailand national team for the
2020 AFF Championship. On 31 March 2026, he scored his first international goal in a 2–1 victory over
Turkmenistan, securing his nation's top spot in their
qualification group and a place at the
2027 AFC Asian Cup. ==Career statistics==