A method of manufacturing a photoelectric converting device comprising an envelope constituted by bonding a first frame, which includes a tabular member and a side wall provided on a main surface of said tabular member so as to surround a center of the main surface and extend along a vertical direction from said main surface, and a second frame which includes a tabular member, said envelope having a light entrance window at least at a part thereof, and housing a photocathode and an anode in an internal space thereof defined by the main surface of said tabular member of said first frame, said side wall of said first frame, and a main surface of said tabular member of said second frame, characterized in that the method comprises: a first step of forming a first metal film on an end face of said side wall of said first frame which faces the main surface of said tabular member of said second frame, the first metal film including one of a metal film in which chromium and nickel are laminated in order along a vertical direction from the end face of said side wall, a metal film in which chromium and titanium are laminated in order in the vertical direction from the end face of said side wall, and a metal film comprised of titanium; a second step of forming a second metal film directly or indirectly on a bonding portion on the main surface of said tabular member of said second frame which faces an end face of said side wall of said first frame, the second metal film including one of a metal film in which chromium and nickel are laminated in order along the vertical direction from the main surface of said tabular member, a metal film in which chromium and titanium are laminated in order along the vertical direction from the main surface of said tabular member, and a metal film comprised of titanium; a third step of arranging said photocathode and said anode in the internal space of said envelope, said third step forming each of said photocathode and said anode onto at least one of the main surface of said tabular member of said first frame and the main surface of said tabular member of said second frame; a fourth step of introducing said first and second frames (5; 2) into a vacuum space decompressed to a predetermined degree of vacuum with a temperature not more than the melting point of indium, and making the end face of said side wall of said first frame and the bonding portion of said second frame face each other while a bonding material containing indium is sandwiched between the first metal film and the second metal film; and a fifth step of bonding said first frame and said second frame in the vacuum space, said fifth step making said first frame and said second frame be brought into close contact with each other with a predetermined pressure while sandwiching the bonding material, and in that, in the steps to be executed after said third step in which said photocathode is arranged in the envelope, the envelope is not heated. a first step of forming a first metal film on an end face of said side wall of said first frame which faces the main surface of said tabular member of said second frame, the first metal film including one of a metal film in which chromium and nickel are laminated in order along a vertical direction from the end face of said side wall, a metal film in which chromium and titanium are laminated in order in the vertical direction from the end face of said side wall, and a metal film comprised of titanium; a second step of forming a second metal film directly or indirectly on a bonding portion on the main surface of said tabular member of said second frame which faces an end face of said side wall of said first frame, the second metal film including one of a metal film in which chromium and nickel are laminated in order along the vertical direction from the main surface of said tabular member, a metal film in which chromium and titanium are laminated in order along the vertical direction from the main surface of said tabular member, and a metal film comprised of titanium; a third step of arranging said photocathode and said anode in the internal space of said envelope, said third step forming each of said photocathode and said anode onto at least one of the main surface of said tabular member of said first frame and the main surface of said tabular member of said second frame; a fourth step of introducing said first and second frames (5; 2) into a vacuum space decompressed to a predetermined degree of vacuum with a temperature not more than the melting point of indium, and making the end face of said side wall of said first frame and the bonding portion of said second frame face each other while a bonding material containing indium is sandwiched between the first metal film and the second metal film; and a fifth step of bonding said first frame and said second frame in the vacuum space, said fifth step making said first frame and said second frame be brought into close contact with each other with a predetermined pressure while sandwiching the bonding material, and in that, in the steps to be executed after said third step in which said photocathode is arranged in the envelope, the envelope is not heated.