A hose clamp tool for engaging and supporting a hose clamp has a handle a shaft operable connected to the handle. A support member is positioned in spaced relation to the shaft and supported there on by a biasing member that biases the support member toward the tool handle. The support member includes a first shoulder disposed toward the handle and a second shoulder spaced from the first shoulder toward a second end of the shaft. When support member is biased away from the handle, a gap is formed between the second end of the shaft and the second should of the support for receiving a bolt on the hose clamp. The second end of the shaft engages the bolt and the support member is released and biased toward the handle so the second shoulder engages the hose clamp at an end of the bolt opposite the bolt head.