Float and solar panels for float

PROBLEM TO BE SOLVED: To provide a float which inhibits deformation of a body made of a synthetic resin even if a gas existing therein is expanded and contracted by environmental temperature change.SOLUTION: A float 10 includes: a float body which is molded into a hollow shape and made of a synthetic resin; a protruding part 202 provided protruding on an upper surface of the float body and having a ventilation hole 201; and a microporous membrane body 203 adhering to the outer side of the ventilation hole 201.SELECTED DRAWING: Figure 4