The men's 100m backstroke events at the 2022 World Para Swimming Championships were held at the Penteada Olympic Swimming Complex in Madeira between 12 and 18 June.
[1] Seven swimmers from six nations took part.
[2] 11 swimmers from nine nations took part.
The swimmers with the top eight times, regardless of heat, advanced to the final.
[5] Eight swimmers from seven nations took part.