Purpose: The International Classification of Functioning, Disability, and Health can be utilized to measure individual health. Although ‘activity’ is one of the components of health, no studies have investigated the frequency of participation of the elderly in daily communication activities, such as talking, reading, and writing. We examined the daily communication behaviors of normal elderly subjects and their effects on cognitive and language test performance. Methods: Normal elderly subjects (n = 456) over 60 years old completed a questionnaire on how often they thought that they talked/read/wrote in their daily lives. Also, they were administered the Korean Mini-Mental State Examination, Controlled Oral Word Association Test, Short Form of the Korean version-the Boston Naming Test, and Sentence Comprehension Test. Results: About 50% of the participants reported that they seldom talked, read, and/or wrote daily. The more frequently that the participants reported daily talking, reading and writing, the better they performed on cognitive and/or language tests. Daily writing influenced the test results the most, which suggested that writing behavior was closely related to all four cognitive/ language tests. Conclusion: These results suggested that daily active communication behaviors play major roles in the cognitive and language abilities of the elderly.