“Geriatric syndrome” refers to clinical conditions commonly seen in older adults that do not fit into discrete disease categories. Many of the common conditions cared for by geriatricians, including delirium, falls, frailty, dizziness, syncope and urinary incontinence, are classified as geriatric syndromes. However, the concept of the geriatric syndrome is still poorly defined. Geriatric syndromes share many common features. They are highly prevalent in older adults, especially frail people. Their effect on quality of life and disability is substantial. Multiple underlying factors, involving multiple organ systems, tend to contribute to geriatric syndromes. Diabetes is common in older adults and the prevalence is estimated at least 20% of population aged o v e r 65 years old in Korea. Diabetes is considered to accelerate ageing, functional decline, and atherosclerotic disease compared to non-diabetic adults. In addition, the development of micro- and macro-vascular complications, dependent on the duration of diabetes are common in older adults with diabetes. So the older adults with diabetes have increased risk of functional disability and frailty. The geriatric syndrome may lead older adults with diabetes to more frail state, loss of independence and poor quality of life. Importantly, this geriatric syndrome might be main barriers in the diabetes treatment and care of older adults. Comprehensive assessment for geriatric syndrome should be performed as an initial examination of older adults with diabetes. Assessment of family or social support, living accommodation and surrounding is also critical. Because of multifactorial and shared risk factors in geriatric syndrome, diabetic patients with geriatric syndrome should be treated with a multidisciplinary concentric strategy including supervised exercise therapy, psychological support, social support, and good glycemic control without hypoglycemia. A unified approach to prevention of this syndrome is also important.