To prevent an erroneous operation of the key interlock mechanism (cylinder key) (60) and further to improve the function of the key interlock mechanism and the operability of the shift lever (30), a shift lever apparatus comprises: a shift lever (30) having a position pin (31) shifted between a park position (P) and drive positions; a shift lever lock mechanism (40) for locking the position pin located at the park position having: a key lock lever (41) formed with a first arm portion (41a) and a second arm portion (41b); a support lever (42) pivotally supported by the second arm portion (41b) of the key lock lever and formed with an end arm portion (42a), the position pin (31) being pinched between the first arm portion (41a) of the key lock lever (41) and the end arm portion (42a) of the support lever (42); a first spring (44) for urging the first arm portion (41a) of the key lock lever (41) toward the position pin; a second spring (45) for urging the end arm portion (42a) of the support lever (42) toward the position pin; and a lock lever (43) associated with the key lock lever (41) to lock the position pin located at the park position; an actuator (46) for selectively pivoting the lock lever (43) between lock and unlock positions of the position pin located at the park position; and a key interlock mechanism (60) driven by an engine key and linked with the second arm portion (41d) of the key lock lever (41) via a key lock cable (61).