  The pulse profile from a neutron star in scalar-tensor theory of gravity is
examined for several stellar models, where we assume the existence of the
antipodal hot spots on the neutron star based on the polar cap model. Then, we
find that the pulse profile from the scalarized neutron star in scalar-tensor
gravity is almost the same as that in general relativity, i.e., without a
scalar field, if the stellar compactness of the both stars is very similar.
That is, the existence of the scalar field does not directly change the pulse
profile from the neutron star, while the stellar compactness is crucial for
determining the pulse shape even in the scalar-tensor gravity. Additionally, we
find that the pulse shape from the scalarized neutron star is more or less
similar to that from the neutron star with the same mass in general relativity,
while the ratio of the minimum amplitude to the maximum amplitude in the pulse
profile depend strongly on the coupling constant in scalar-tensor gravity,
depending on the angle between the rotational and magnetic axes and the angle
between the rotational axis and the direction to the observer. So, the direct
observation of the pulse profile together with the additional observation of
the stellar mass, one may extract the imprint of the gravitational theory in
strong field regime.
