A semiconductor memory apparatus including a test circuit configured for generating compressed data by comparing and compressing data stored in a plurality of memory cells inside a memory bank during a first test mode, and configured for outputting the compressed data as test data to an input/output pad through one selected global line during the first test mode, and the test circuit is configured for transmitting the compressed data to a plurality of global lines during a second test mode, combining the compressed data loaded in the respective global lines during the second test mode, and outputting the combination result as the test data to the input/output pad during the second test mode.