The Kremlin confirmed the visit and a Wednesday meeting between the two leaders, saying they would discuss "perspectives for the development of Russian-Chadian relations in different areas along with current regional and international issues."
Chad, where the French army still retains a military contingent, is France's last close partner in the Sahel region following the forced withdrawal of French troops from Mali in August 2022, Burkina Faso in February 2023 and Niger in December.
Those three countries have since all moved closer to Russia, especially militarily following the end of Operation Barkhane which ran from 2014 to 2022 and saw France lead a military counterinsurgency against Islamic insurgents in the Sahel.
Russia, notably in the form of private Wagner mercenaries, is also present and influential in the Central African Republic, Libya and Sudan, which border Chad.
Mahamat Deby was proclaimed head of an army junta two years ago after rebels killed his father Idriss Deby Itno, who had himself seized power in a coup and ruled the desert nation with an iron fist for three decades.
Chad's army is generally regarded as a mainstay of the anti-jihadist fight in the region.
The transitional regime under the general has indicated that presidential elections will be held by the end of this year, having been urged by the international community to stick to an initial pledge to hold elections within 18 months.
Chad President Leaves for Meeting with Putin in Moscow
FILE - President of Chad Mahamat Idriss Deby gestures as he arrives for a meeting over security in the Sahel region at the Elysee Palace in Paris, France, November 12, 2021.
LIBREVILLE — Chad's transitional president General Mahamat Idriss Deby Itno embarked Tuesday on an official visit to Russia "at the invitation" of Russian President Vladimir Putin, the two states announced.