Several metamemory questionnaires have been widely used in psychological research with various populations including young or elderly, and clinical or non-clinical participants. This study investigates the factor structures in three typical metamemory questionnaires. The Everyday Memory Questionnaire (EMQ: 28 items), the Cognitive Failures Questionnaire (CFQ: 25 items), and the Memory Ability Questionnaire (MAQ: 31 items) were administered to 860 undergraduate students. Factor analyses for the data from each questionnaire indicated that the EMQ, the CFQ, and the MAQ mainly consisted of five, five, and four factors, respectively. A factor analysis was performed on the combined data relating to these 14 factors to examine the relatedness among the factors. Three factors were obtained: retrospective memory, prospective memory, and memory for person's names. The results were discussed in terms of the differences of content and formats of the questionnaire.