Effect of interfacial electrical conditions such as, the ζ potential of PET fiber and α-Fe_20_3 particles, the stability parameter and potential energy of interaction on adhesion of α-Fe_20_3 particles to PET fabric and their removal from the fabric, were investigated as functions of pH, electrolyte and ionic strength. The stability parameter, potential energy of interaction between α-Fe_20_3 particles and PET fabric were calculated by using the heterocoagulation theory for a sphere-plate model. The adhesion of α-Fe_20_3 particles to PET fabric and their removal from PET fabric were carried out by using water bath shaker and Terg-O-Tometer under various solution conditions. The adhesion of α-Fe_20_3 particles to the PET fabric and the removal of α-Fe_2O_3 particles from the PET fabric were biphasic and were maximum and minimum at pH 7∼8, respectively. With high pH and polyanion electrolytes in solution, the adhesion of α-Fe_20_3 particles to the PET fabric was low but effects of electrolytes on the removal of α-Fe_20_3 particles from the PET fabric was small. The adhesion of α-Fe_2O_3 particles to the PET fabric and the removal of α-Fe_20_3 particles from the PET fabric were biphasic, and were lowest and highest at the ionic strength 1×10exp(－３), respectively. The adhesion of α-Fe_20_3 particles to PET fabric was well related with the interfacial electrical conditions; it was negatively correlated with the ζ potentials of α-Fe_20_3 particles of its absolute value, the stability parameter and the maximum of total potential energy, while, the adhesion was not related with the ζ potentials of PET fiber itself. Therefore, the primary factor determining the adhesion of α-Fe_20_3 particles to PET fabric may be the stability of dispersed particles caused by the electrical repulsion of particles. The removal of α-Fe_20_3 particles from PET fabric was not related to such interfacial electrical conditions as the ζ potentials of PET fiber, the stability parameter and the maximum of total potential energy but removal was related to ζ potential of α-Fe_20_3 particles.