Collecting online group chat messages. The method may include receiving a message associated with an online group chat session between chat participants. The method may also include determining the received message satisfies at least one message collection rule. The method may further include recording the received message to at least one message table based on each chat participant mentioned in the received message. The method may also include determining a first chat participant chooses to open a private chat session with at least one second chat participant. The method may further include identifying recorded messages within the message tables associated with the at least one second chat participant. The method may also include displaying the identified recorded messages in a private chat session sub-window.