There are two problems that are hidden behind the moniker "proton radius puzzle". One is the discrepancy between the spectroscopic measurements of the proton radius in ordinary and muonic hydrogen. Another is the discrepancy between the proton radius extracted from the electron-proton scattering and from the muonic hydrogen spectroscopy. I will remind how the proton radius is measured in all three types of experiments. The current status of the proton radius puzzle and the progress on the road to its resolution will be discussed.