Abstract: There is provided a reactive powder enabling a satisfactory and stable self-propagating high temperature synthesis (SHS) reaction. Also, there is provided a bonding material enabling reliable bonding, by using the reactive powder, while inhibiting thermal degradation of a joint member without depending on a surface shape to be bonded of the joint member. The reactive powder is a reactive powder enabling self-propagating high temperature synthesis including a first material and a second material that chemically react with each other, in which each grain constituting the reactive powder is in a state that first sub-grains made of the first material and second sub-grains made of the second material are disorderly mixed within the grain.