Electric apparatus provided with frame and power supply

An image forming apparatus comprising:

• a casing;
• a power supply accommodated in the casing and comprising:
• a power supply board having a mounting surface;
• and
• a power supply component mounted on the mounting surface;
• a frame extending in a vertical direction and disposed outward of the power supply within the casing, the frame being formed with a through-hole extending therethrough, the frame having a first part and a second part,
• the through-hole having one open end open to an inner surface of the casing and another open end open to the power supply, the through-hole facing the power supply component in a horizontal direction orthogonal to the vertical direction, the through-hole being surrounded by an ambient portion of the frame,
• the first part being made from a flame retardant resin and constituting at least a part of the ambient portion, the at least a part of the ambient portion being positioned at a side the same as the power supply component with respect to the mounting surface,
• at least a part of the second part being made from a material having flame retardancy lower than that of the flame retardant resin;
• a fan configured to generate an airflow directed from the power supply to the through-hole;
• and
• an image forming unit accommodated in the casing and disposed at a side the same as the power supply with respect to the frame.