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In order to study the basic superconductivity properties of Pr2Pt3Ge5,we synthesized the single crystalline samples by the Pt-Ge self-flux method.R2Pt3Ge5 (R =La,Ce) were also grown for a systematic study.Zero-resistivity was observed in both the La-and Pr-based samples below the reported superconducting transition temperatures.However,magnetic susceptibility measurements showed low superconductivity volume fractions in both La2Pt3Ge5 and Pr2Pt3Ge5 (less than 2％).Ce2Pt3Ge5 did not show any signature of superconductivity.From the specific heat measurements,we did not observe a superconducting transition peak in Pr2Pt3Ges,suggesting that it is not a bulk superconductor.The magnetic susceptibility and heat capacity measurements revealed two antiferromagnetic (AFM) orders in Pr2Pt3Ge5 at TN1 =4.2 K and TN2 =3.5 K,as well as a single AFM transition at TN =3.8 K in Ce2Pt3Ge5.