Provided is an automatic analyzer capable of replacing an insertion mechanism while suppressing occurrence of dispensing abnormality and analysis result abnormality accompanying deterioration of the insertion mechanism. Included are an insertion mechanism that is inserted into a closed container through a lid of the container; a storage unit that stores an insertion history count corresponding to a cumulative load of the insertion mechanism caused by inserting the insertion mechanism into a plurality of the containers, and an allowable insertion history count which is an allowable value of the insertion history count; and a control unit that compares the insertion history count with the allowable insertion history count and performs control to make a notification to an operator in a case where the insertion history count reaches the allowable insertion history count.