Image forming apparatus capable of measuring an amount of adhered toner and controlling an image density

An image forming apparatus comprising:

• an image forming unit configured to form a toner image on an image bearing member;
• a first detection unit configured to detect a height of the toner image formed according to a predetermined image forming condition by the image forming unit, the height of the toner image being a height in a direction perpendicular to a surface of the image bearing member;
• a determination unit configured to determine an image forming condition of the image forming unit according to a detection result of the first detection unit;
• a second detection unit configured to detect a density of the toner image formed according to a predetermined image forming condition by the image forming unit;
• and
• a correction unit configured to correct the image forming condition of the image forming unit determined by the determination unit based on the density of the toner image detected by the second detection unit.