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Modern building structures are light and flexible, causing problems of habitability induced by excessive building vibration. In general, the problem of vertical vibration is not considered in structural design. However, in terms of serviceability for inhabitants in buildings, the estimation of vertical vibration in design stage is important. Characteristics of vertical vibration is changed by modeling method of beam-column joint. To check the characteristics of vertical vibration, many tests and analyses were conducted on constructing building in Seoul. Results of tests and analyses were compared using the transfer functions obtained at the different places of the existing building in Seoul. It is concluded that, to check the vertical vibration characteristics, the cramp ratio of beam-column joint must be considered and reduced to 50%∼60% in structural design.