Alyaksandr Uladzimiravich Martynovich (Belarusian: Аляксандр Уладзiмiравiч Мартыновіч, Russian: Александр Владимирович Мартынович; born 26 August 1987) is a Belarusian professional footballer who plays as a centre-back for Kazakhstan Premier League club Kairat.

[5] On 13 June 2022, Martynovich signed a two-year contract with Rubin Kazan.

[8] Martynovich was part of the Belarus U-21 squad that participated in the 2009 UEFA European Under-21 Football Championship and played as a starter in the 1–5 loss against Sweden U-21, during which he scored an unfortunate own goal.

[9] He has been capped for Belarus national team since November 2009, receiving his first call-up during Bernd Stange's tenure as coach.

[10] On 17 November 2010, Martynovich scored his only two goals for the team in the 4–0 away win against Oman in a friendly match.