He is a signatory to the Global Appeal to Ban 5G, which has so far attracted more than 100,000 signatories around the world. Mr Morawiecki has signed it in his personal capacity and not as a representative of the Polish government.
The appeal has been mounted by a group of doctors, scientists and environmental activists who argue that radio frequency (RF) radiation has never been tested for its impact on human health, and especially at the intensity it will be generated by the new 5G network.
The appeal argues that 5G is "an experiment on humanity and the environment that is defined as a crime under international law."
Three Polish cities, including the capital, Warsaw, are being used to test the new network.