Eateries, which until now could only serve outside, will now be able to accept guests inside.
The amount of customers that restaurants, bars and cafes can serve will depend on the size of the premises.
According to new rules, face masks and gloves will have to be worn by staff, while guests will have to be seated at a distance of at least one and a half meters from each other.
Special events, such as weddings and communions, can be also now held indoors and attended by up to 50 people, which does not include people fully vaccinated against the virus.
Public health officials on Friday reported 946 new infections, down from a high of 35,251 single-day cases on April 1.
As of Friday, Poland had injected over 13.3 million first doses of COVID-19 vaccines, while more than 6.3 million people had been fully inoculated, according to the health ministry.