Electrostatic image developer and image forming apparatus

An electrostatic image developer comprising:

• a toner that contains an external additive having a volume-average particle size of about 80 nm or more and about 400 nm or less and an average circularity of about 0.7 or more and about 0.85 or less,
• wherein the electrostatic image developer is used in an image forming apparatus including
• an image-carrying member that has a top surface layer containing fluorocarbon resin particles dispersed therein and that carries an electrostatic latent image, and
• a developer-carrying member that is arranged so as to face the image-carrying member and that carries an electrostatic image developer,
• in which a value obtained by dividing the amount of developer per unit area carried on the developer-carrying member [g/m2] by a shortest distance between the image-carrying member and the developer-carrying member [μm] is about 0.8 or more and about 1.8 or less, and
• a peripheral velocity ratio of a peripheral velocity of the developer-carrying member to a peripheral velocity of the image-carrying member is about 1.5 or more and about 5.0 or less or the developer-carrying member moves in a direction opposite to a moving direction of the image-carrying member in a portion where the developer-carrying member and the image-carrying member face each other.