An electronic cassette has a casing that houses a radiation converter thereinside. The radiation converter detects radiation from a radiation source that has been transmitted through a subject, and converts the radiation into radiographic image information. Plural handles are disposed on the casing of the electronic cassette, so that a person can grip the plural handles and carry the electronic cassette. Thus, the person can grip and carry the electronic cassette while dispersing the weight of the electronic cassette, so carrying the electronic cassette becomes easy. Further, when the person loads the electronic cassette into a shooting table or the like, the person can grip either of the plural handles and load the electronic cassette. For this reason, handling of the electronic cassette becomes easy.