Arsenal have been wearing Puma kits since 2014 after signing a £30m per-year deal with the sportswear company.
According to reports from the British media, the deal with Adidas will earn Arsenal about £300m over five years- £60m per year.
The new kit deal ensures that Arsenal will wear the Adidas kit for the first time since 1994.
While Puma have lost a big client in Arsenal, they gain similar club in size, Manchester United in a deal worth £50m a year which will kick off also in 2019.
Premier League kit deals
Arsenal now have the second biggest kit deal in the Premier League with their £60m per-year deal second only to Manchester United who have an existing £75m a year with the same sportswear company.
Chelsea's deal with Nike which they signed in 2017 and will run till 2032 is worth the same £60m as Arsenal.
Tottenham have a deal with Nike too worth £30m which started in 2017 while Liverpool and Warrior have a £25m a year deal.