In a power tool, a housing is composed of two divisional housings to be combined together; two receptacle blocks are provided on inner surfaces of the two divisional housings, respectively, and configured to protrude opposite to each other from the inner surfaces of the two divisional housings to surround an electric component and to hold the electric component in place when the two divisional housings are combined together into the housing; and a seal layer of an elastic material is formed integrally with one or each of the two receptacle blocks. The seal layer formed on a first receptacle block is pressed against a second receptacle block or another seal layer formed on the second receptacle block to provide sealing between opposed surfaces of the two receptacle blocks when the two divisional housings are combined together.