A process for producing a perfluoroalkyne compound includes an addition reaction step of adding Cl
2
, Br
2
, or I
2
to a compound shown by the formula (1) CH
3
C≡CR
1
to obtain a compound shown by the formula (2) CH
3
CX
2
CX
2
R
1
, a fluorination reaction step of reacting the compound shown by the formula (2) with fluorine gas to obtain a compound shown by the formula (3) CF
3
CX
2
CX
2
R
2
, and a dehalogenation reaction step of contacting the compound shown by the formula (3) with a metal or an organometallic compound to obtain a perfluoroalkyne compound shown by the formula (4) CF
3
C≡CR
2
. According to the present invention, a perfluoroalkyne compound can be produced at high productivity and high yield using starting raw materials which are environmentally friendly and industrially available. In the above formulas, R
1
represents a methyl group or an ethyl group, X represents Cl, Br, or I, and R
2
represents a trifluoromethyl group or a pentafluoroethyl group.