A health promoting apparatus for treating or preventing hypertension, diabetes and/or dementia, the apparatus comprising: an oscillation generator configured to oscillate a head of the user in a vertical direction; and an oscillation controller connected to the oscillation generator, and configured to control an oscillation generated by the oscillation generator, wherein the oscillation controller is configured: to control the oscillation generator to apply shear stress to cells in the brain of the user by moving interstitial fluid in the brain, in order to promote the health of the user; to control the oscillation generator to set a frequency of the oscillation from 1 to 3 Hz, to control the oscillation generator to accelerate the head of the user from ± 0.3 to 2.0 x g; and to control the oscillation generator to set an amplitude of the oscillation in the vertical direction to equal to or less than 8 cm, and wherein the apparatus is configured to apply an impulse-shaped acceleration to the head of the user, wherein the apparatus further comprises: a seat part on which the user sits, and to which the oscillation is applied by the oscillation generator, a backrest part which supports a back of the user; and a headrest part which supports the head of the user, and wherein the apparatus is configured to oscillate the head of the user in the vertical direction, in such state that the user is seated on the seat part and the head is supported by the headrest part. an oscillation generator configured to oscillate a head of the user in a vertical direction; and an oscillation controller connected to the oscillation generator, and configured to control an oscillation generated by the oscillation generator, wherein the oscillation controller is configured: to control the oscillation generator to apply shear stress to cells in the brain of the user by moving interstitial fluid in the brain, in order to promote the health of the user; to control the oscillation generator to set a frequency of the oscillation from 1 to 3 Hz, to control the oscillation generator to accelerate the head of the user from ± 0.3 to 2.0 x g; and to control the oscillation generator to set an amplitude of the oscillation in the vertical direction to equal to or less than 8 cm, and wherein the apparatus is configured to apply an impulse-shaped acceleration to the head of the user, wherein the apparatus further comprises: a seat part on which the user sits, and to which the oscillation is applied by the oscillation generator, a backrest part which supports a back of the user; and a headrest part which supports the head of the user, and wherein the apparatus is configured to oscillate the head of the user in the vertical direction, in such state that the user is seated on the seat part and the head is supported by the headrest part. to control the oscillation generator to apply shear stress to cells in the brain of the user by moving interstitial fluid in the brain, in order to promote the health of the user; to control the oscillation generator to set a frequency of the oscillation from 1 to 3 Hz, to control the oscillation generator to accelerate the head of the user from ± 0.3 to 2.0 x g; and to control the oscillation generator to set an amplitude of the oscillation in the vertical direction to equal to or less than 8 cm, and wherein the apparatus is configured to apply an impulse-shaped acceleration to the head of the user, wherein the apparatus further comprises: a seat part on which the user sits, and to which the oscillation is applied by the oscillation generator, a backrest part which supports a back of the user; and a headrest part which supports the head of the user, and wherein the apparatus is configured to oscillate the head of the user in the vertical direction, in such state that the user is seated on the seat part and the head is supported by the headrest part.