The temperature dependence of the resistivity for the (YBCO)n/(PBCO)m superlattice with n/m = 48/60 and 48/36 has been measured under hydrostatic pressure up to 11 kbar. A metal-semiconductor-like transition around 7 kbar has been observed for both samples. We attempt to explain this transition by a model of the pressure-induced hole-depletion by the Pr-ion.