In the provided engine lubricating oil supply device (1), a connection hole (45) is opened and closed by a ball valve element (53) as a result of a balance between hydraulic pressure from lubricating oil that flows into a piston chamber (31) and a biasing force from a shape-memory spring (51) that changes in accordance with the temperature of the lubricating oil. Lubricating oil that flows from the connection hole (45) into a storage space (44) is drained via a second drain passage (46), thereby adjusting the degree of opening of a first drain passage (34) by sliding a piston (35) by way of a balance between a biasing force from a valve spring (39) and a pressure differential that arises between an upstream chamber (32) and a downstream chamber (33) as a result of the lubricating oil flowing past an orifice (38).
