Supported metal material, supported metal catalyst, method of producing ammonia, method of producing hydrogen and method of producing cyanamide compound

A method for producing ammonia, comprising a step of reacting nitrogen and hydrogen in the presence of a supported metal material in which a transition metal is supported on a support, wherein a reaction temperature for reacting nitrogen and hydrogen is 100° C. or more and 600° C. or less, and a reaction pressure for reacting nitrogen and hydrogen is 0.1 MPa or more and 20 MPa or less,

• wherein the support is a cyanamide compound represented by the following general formula (1):
• MCN2 (1)
• wherein M is at least one selected from the group consisting of Sr and Ba;
• the transition metal is at least one selected from the group consisting of Ru, Co, and Ni;
• a specific surface area of the supported metal material is 5 m2g−1 or more, and 50 m2g−1 or less;
• and
• a specific surface area of the cyanamide compound is 1 m2g−1 or more, and 50 m2g−1 or less.