Čech signed for Chelsea's Premier League rivals Arsenal on a four-year contract on 29 June 2015, for a fee of around £10 million. His move saw him subjected to death threats by a few Chelsea supporters. The departure of Wojciech Szczęsny to Roma on loan made Čech first-choice goalkeeper ahead of David Ospina. On 2 August, Čech won his first trophy with Arsenal after beating former side Chelsea 1–0 in the 2015 FA Community Shield. A week later, he made his Premier League debut for Arsenal in a 2–0 home defeat to West Ham. On 20 October, he made his first Champions League appearance for Arsenal in a 2–0 win against Bayern Munich.