Swimming at the 2020 Summer Paralympics – Men's 50 metre backstroke

The S1 category is for swimmers who may have tetraplegia, or some form of loss of muscular power in their legs, arms and hands. These swimmers would regularly use a wheelchair.

The final in this classification took place on 2 September 2021:

Rank	Lane	Name	Nationality	Time	Notes
	4	Iyad Shalabi	Israel	1.11.79
	5	Anton Kol	Ukraine	1.13.78
	3	Francesco Bettella	Italy	1.14.87
4	6	Jose Ronaldo Da Silva	Brazil	1.21.57	AM
5	2	Dimitrios Karypidis	Greece	1.25.30
6	7	Luis Eduardo Rojas Osorno	Colombia	1.37.53
7	1	Aliaksei Talai	Belarus	1.55.58

The S2 category is for swimmers who may have limited function in their hands, trunk, and legs, and mainly rely on their arms to swim.

The final in this classification took place on 2 September 2021:

Rank	Lane	Name	Nationality	Time	Notes
	4	Gabriel Araújo	Brazil	53.96	AM
	5	Alberto Abarza	Chile	57.76
	6	Vladimir Danilenko	RPC	59.47
4	2	Nikita Kazachiner	RPC	1.00.54
5	3	Roman Bondarenko	Ukraine	1.00.61
6	1	Ievgen Panibratets	Ukraine	1.03.00
7	8	Aristeidis Makrodimitris	Greece	1.03.28
8	7	Jacek Czech	Poland	1.05.13

The S3 category is for swimmers who have leg or arm amputations, have severe coordination problems in their limbs, or have to swim with their arms but don't use their trunk or legs.

The final in this classification took place on 29 August 2021:

Rank	Lane	Name	Nationality	Time	Notes
	3	Zou Liankang	China	45.25
	5	Denys Ostapchenko	Ukraine	45.57
	4	Diego López Díaz	Mexico	45.66
4	2	Jesús Hernández Hernández	Mexico	45.75
5	6	Vincenzo Boni	Italy	47.88
6	1	Serhii Palamarchuk	Ukraine	49.65
7	7	Josia Tim Alexander Topf	Germany	49.99
8	8	Miguel Ángel Martínez Tajuelo	Spain	54.57

The S4 category is for swimmers who have function in their hands and arms but can't use their trunk or legs to swim, or they have three amputated limbs.

The final in this classification took place on 3 September 2021:

Rank	Lane	Name	Nationality	Time	Notes
	5	Roman Zhdanov	RPC	40.99	WR
	4	Arnošt Petráček	Czech Republic	41.26
	3	Ángel de Jesús Camacho Ramírez	Mexico	43.25
4	2	Dmytro Vynohradets	Ukraine	44.91
5	6	Liu Benying	China	45.21
6	1	Matz Topkin	Estonia	45.42
7	8	Xavier Torres	Spain	46.93
8	7	Ronystony Cordeiro da Silva	Brazil	46.95

The S5 category is for swimmers who have hemiplegia, paraplegia or short stature.

The final in this classification took place on 30 August 2021:

Rank	Lane	Name	Nationality	Time	Notes
	6	Tao Zheng	China	31.42	WR
	4	Ruan Jingsong	China	32.97
	3	Wang Lichao	China	33.38
4	5	Yaroslav Semenenko	Ukraine	35.05
5	2	Daniel de Faria Dias	Brazil	35.99
6	7	Igor Plotnikov	RPC	37.40
7	1	Andrew Mullen	Great Britain	37.96
8	8	Antoni Ponce Bertran	Spain	38.42