To propose a new polyethylene sheet as a suitable sheet for PTP package which is excellent in fabrication quality, transparency, and water vapor barrier properties.

The proposed polyethylene sheet includes a resin layer (I) containing an ethylene polymer (A) that has a given crystal melting temperature and crystal meling calory; a nucleating agent (B); and a given olefin compatibility resin (C), wherein the proportion of (B) in the resin composition constituting the resin layer (I) is 0.01 mass% or more and 3 mass% or less, and the proportion of (C) in the resin composition is 5 mass% or more and 30 mass% or less.