Recent advance in early diagnosis and treatment has improved the outcome of a variety of congenital heart diseases (CHD). In fact, patients with CHD account for approximately one percent of live birth (12,000 patients per year in Japan), 95% of which survive into adulthood. As of 2016, the number of adults associated with CHD is estimated to be 500,000 in Japan. However, residual or post-operative right- and left-sided anatomic and hemodynamic abnormalities are common. As the age advances, comorbidity including acquired heart disease also becomes a problem. Major advances in noninvasive imaging of adult CHD have been accomplished, which is relevant to the life-long management of patients. In addition to echocardiography, magnetic resonance (CMR) and computed tomography (MDCT) have gained particular importance. 3D (4D) speckle tracking confers a new information of local wall motion even in right ventricle. CMR allows unlimited access to imaging the heart and thoracic cavity unrestricted by rib spaces. CMR provides accurate and reproducible quantification of right and left ventricular volumes, mass, and function; assessment of degree of valvar dysfunction, multi-level outflow tract obstruction, shunt quantification, differential branch PA flow, and non-invasive tissue characterization. With CMR derived 4-dimensional flow analysis, blood flow patterns can be assessed within the heart and vessels. T1 mapping is a new quantitative imaging of extracellular volume fraction, which helps in detection of cardiac fibrosis. MDCT has excellent 3D spatial resolution and allows for detailed evaluation of even small peripheral vessels. Three-dimensional (3D) reconstruction or printing is an emerging technology that enables creation of computer-based or physical anatomic models from a patient’s imaging datasets. Such a model allows the surgeon or interventionist direct visualization of a patient’s 3D cardiac anatomy before entering the operating room or catheterization laboratory. These tools play now a key role in comprehensive diagnostic work-up, decision for intervention, evaluation for the suitability of specific therapeutic options, monitoring of interventions and regular follow-up. In the present session, we will discuss recent findings related to the imaging and the clinical application in adults associated with CHD.