The present invention relates a T1-T2 dual-modal MRI (magnetic resonance imaging) contrast agent, comprising (a) a first layer consisting of T1 contrast material (b) a second layer consisting of T2 contrast material and (c) a separating layer which is present in a space between the first layer and the second layer, and inhibits a reciprocal interference between T1 contrast material and T2 contrast material, and a heat-generating composition and a drug delivery composition having the same. The T1-T2 dual-modal contrast agent of the present invention may generate both T1 and T2 signal and thus observe the signal complementarily, resulting in accurate diagnosis through reduction of misdiagnosis. Further, T1 and T2 MR imaging may be simultaneously obtained by simple operation within the same MR imaging device, enabling to remarkably reduce a diagnosis time and diagnosis cost. In addition, the particle constituting the T1-T2 dual-modal contrast agent of the present invention may be applied to hyperthermia and drug delivery systems.
