There is disclosed a piezoelectric/electrostrictive body which has superior piezoelectric/electrostrictive properties and which exhibits a sufficient durability even in a case where a flexural displacement is repeated a large number of times. A piezoelectric/electrostrictive body (30) is constituted of a large number of crystal grains (31) having the piezoelectric/electrostrictive properties in the form of a film or a layer having one or more layers. 80% or more of a large number of crystal grains (31) observed in an arbitrary section in the thickness direction of the body are grains exposed to at least one of interfaces (35a,35b) between the body and the outside in a thickness direction.