A failure information sharing system comprising: multiple user-side production devices; and a support-side information server configured for supporting the user-side production devices, the user-side production devices and the support-side information server being connected so as to be able to communicate with each other via a network, wherein the support-side information server includes an information registration section configured to collect and register failure information generated in the multiple user-side production devices and update and register failure avoidance information as a failure avoidance method becomes apparent on the support side, and either the production devices constitute a production line, optionally the production devices comprise one or more component mounters, wherein the support-side information server further includes an information distribution section configured to distribute the failure information and the failure avoidance information to the multiple user-side production devices periodically or each time the registration information is updated, each of the multiple user-side production devices includes an information receiving section configured to receive the failure information and the failure avoidance information from the support-side information server periodically or each time the registration information is updated, and an information transmitting section configured to transmit to a user-side production manager the failure information and the failure avoidance information related to, among the failure information and the failure avoidance information received by the information receiving section, a failure that may occur at least at a production device managed by the production manager, the production device being of the multiple user-side production devices, and each of the multiple user-side production devices includes a failure avoidance measure executing section configured to interpret the failure information and the failure avoidance information received from the support-side information server and execute failure avoidance measures for avoiding the failure. multiple user-side production devices; and a support-side information server configured for supporting the user-side production devices, the user-side production devices and the support-side information server being connected so as to be able to communicate with each other via a network, wherein the support-side information server includes an information registration section configured to collect and register failure information generated in the multiple user-side production devices and update and register failure avoidance information as a failure avoidance method becomes apparent on the support side, and either the production devices constitute a production line, optionally the production devices comprise one or more component mounters, wherein the support-side information server further includes an information distribution section configured to distribute the failure information and the failure avoidance information to the multiple user-side production devices periodically or each time the registration information is updated, each of the multiple user-side production devices includes an information receiving section configured to receive the failure information and the failure avoidance information from the support-side information server periodically or each time the registration information is updated, and an information transmitting section configured to transmit to a user-side production manager the failure information and the failure avoidance information related to, among the failure information and the failure avoidance information received by the information receiving section, a failure that may occur at least at a production device managed by the production manager, the production device being of the multiple user-side production devices, and each of the multiple user-side production devices includes a failure avoidance measure executing section configured to interpret the failure information and the failure avoidance information received from the support-side information server and execute failure avoidance measures for avoiding the failure.