Iron-based mixed powder for powder metallurgy and iron-based sintered body

An iron-based mixed powder for powder metallurgy, comprising:

• an iron-based alloy powder;
• and
• an alloying powder,
• wherein the iron-based alloy powder contains Mo:
• 0.2 mass % or more and 1.5 mass % or less,
• the alloying powder contains a graphite powder and a copper powder,
• a ratio of a mass of the graphite powder to a total mass of the iron-based alloy powder and the alloying powder is 0.10 mass % to 1.0 mass %,
• a ratio of a mass of the copper powder to the total mass of the iron-based alloy powder and the alloying powder is 0.5 mass % to 3.0 mass %, and
• the copper powder has an average particle size of 15 μm or more and 25 μm or less, and a specific surface area of 0.30 m2/g to 0.60 m2/g, the average particle size of the copper powder being defined as a median size of primary particles of the copper powder measured by a laser diffraction-scattering type particle size distribution measurement device.