Provided is an information input system including an information input field display section that displays an information input field for inputting information for each of plural persons inputting information, a specified problem input field display section that displays a specified problem input field for inputting a character string indicating a specified problem with respect to the input information for a problem-specifying person, a recording section that associates and records character string information with the information input field when an input of the character string is received from the problem-specifying person, and a guidance display section that displays, as input guidance, at least one character string information item, which is recorded by the recording section, along with the information input field when a request for display of the information input field is received from any one of the plural persons inputting information.