“Pedestrians must not use mobile devices before stepping onto the street or walking across it,” Transport Minister Rokas Masiulis told a cabinet meeting that was broadcast live.
Starting next month, crossing the street while talking on or checking a phone could cost Lithuanians a fine of up to 40 euros ($46).
Honolulu introduced a similar law last year, though the state capital of Hawaii only banned viewing a mobile device during crossings, not talking on the phone.
Last year, 68 pedestrians were killed by cars or motorcycles in Lithuania, a eurozone member of 2.8 million people.
The rate of Lithuanian pedestrian deaths is the third worst in the European Union, after Romania and Latvia, according to the latest official data.