When Parks refused to give up her seat, a police officer arrested her. As the officer took her away, she recalled that she asked, "Why do you push us around?" She remembered him saying, "I don't know, but the law's the law, and you're under arrest." She later said, "I only knew that, as I was being arrested, that it was the very last time that I would ever ride in humiliation of this kind. ... ". Parks was charged with a violation of Chapter 6, Section 11 segregation law of the Montgomery City code, although technically she had not taken a white-only seat; she had been in a colored section. Edgar Nixon, president of the Montgomery chapter of the NAACP and leader of the Pullman Porters Union, and her friend Clifford Durr bailed Parks out of jail that evening.
around 6 p.m., Thursday, December 1, 1955, in downtown Montgomery. She paid her fare and sat in an empty seat in the first row of back seats reserved for blacks in the "colored" section. Near the middle of the bus, her row was directly behind the ten seats reserved for white passengers. Initially, she did not notice that the bus driver was the same man, James F. Blake, who had left her in the rain in 1943. As the bus traveled along its regular route, all of the white-only seats in the bus filled up. The bus reached the third stop in front of the Empire Theater, and several white passengers boarded. Blake noted that two or three white passengers were standing, as the front of the bus had filled to capacity. He moved the "colored" section sign behind Parks and demanded that four black people give up their seats in the middle section so that the white passengers could sit. Parks moved, but toward the window seat; she did not get up to move to the redesignated colored section. Parks later said about being asked to move to the rear of the bus, "I thought of Emmett Till and I just couldn't go back." Blake said, "Why don't you stand up?" Parks responded, "I don't think I should have to stand up." Blake called the police to arrest Parks.