diff --git a/docs/src/index.md b/docs/src/index.md
index f3b47c1..de514c8 100644
--- a/docs/src/index.md
+++ b/docs/src/index.md
@@ -25,3 +25,7 @@ You sometimes want to split logs and to give more appropriate notes for each of
 You can do this with [`split_log`](@ref) function.
 
 You can also edit existing notes with [`assign_note!`](@ref).
+
+### Exporting
+Use [`export_log`](@ref) to export log to `io` or `file`.
+
diff --git a/src/CoordVisualize.jl b/src/CoordVisualize.jl
index a6660aa..081a90f 100644
--- a/src/CoordVisualize.jl
+++ b/src/CoordVisualize.jl
@@ -2,6 +2,8 @@ module CoordVisualize
 
 using Dates
 
+export CoordLog
+
 include("typedef.jl")
 include("parser.jl")
 include("edit.jl")
diff --git a/src/print.jl b/src/print.jl
index e69de29..8c173ca 100644
--- a/src/print.jl
+++ b/src/print.jl
@@ -0,0 +1,30 @@
+"""
+Export `log` to a file or `io::IO`.
+"""
+function export_log end
+
+function export_log(log::CoordLog)
+    """
+    CoordLog(
+        $(log.coords),
+        Dates.DateTime("$(log.logdate)"), "$(log.note)"
+    )"""
+end
+
+function export_log(logs::Vector{CoordLog})
+    logs .|>
+        export_log |>
+        (vs -> join(vs, ",\n")) |>
+        (s -> "[\n" * s * "\n]")
+end
+
+function export_log(io::IO, log::CoordLog)
+    write(io, export_log(log))
+end
+
+function export_log(file::AbstractString, log::CoordLog)
+    open(file, "w") do f
+        export_log(f, log)
+    end
+end
+
diff --git a/src/typedef.jl b/src/typedef.jl
index 83f125a..20ce80c 100644
--- a/src/typedef.jl
+++ b/src/typedef.jl
@@ -1,4 +1,5 @@
 using Dates
+import Base
 """
 Stores a set of logs with its taken date datetime and supplemental note.
 """
@@ -16,3 +17,7 @@ Get number of coordinates in `log`.
 function n_coords(log::CoordLog)::Integer
     size(log.coords)[1]
 end
+
+Base.:(==)(x::CoordLog, y::CoordLog) = begin
+    x.note == y.note && x.logdate == y.logdate && x.coords == y.coords
+end
diff --git a/test/runtests.jl b/test/runtests.jl
index 3639d3b..1e42e9a 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -5,11 +5,15 @@ using Test
 @testset "CoordVisualize" begin
     "Must be same as the first log in `sample_log.txt`"
     sample_log_1 = CoordVisualize.CoordLog[CoordVisualize.CoordLog{Float64}([-54.0 -10.000000953674 -35.000003814697; -54.0 -10.000000953674 -35.000003814697; -54.0 -10.000000953674 -36.013381958008; -54.0 -10.000000953674 -37.615753173828; -54.0 -10.000000953674 -39.261665344238; -54.0 -10.000000953674 -40.727695465088; -54.0 -10.000000953674 -42.168701171875; -54.0 -10.000000953674 -43.820377349854; -54.0 -11.018865585327 -47.018901824951; -54.0 -14.0 -51.176284790039; -54.663269042969 -14.0 -55.0; -58.297706604004 -14.0 -55.0; -63.16588973999 -16.0 -55.0; -66.000007629395 -16.0 -55.526763916016; -66.000007629395 -16.0 -59.460041046143; -66.000007629395 -16.0 -63.24658203125; -66.000007629395 -16.0 -67.261924743652; -66.000007629395 -16.0 -71.199310302734], Dates.DateTime("2023-10-22T10:02:04"), "")]
+    sample_log_1_2 = CoordVisualize.CoordLog[CoordVisualize.CoordLog{Float64}([-54.0 -10.000000953674 -35.000003814697; -54.0 -10.000000953674 -35.000003814697; -54.0 -10.000000953674 -36.013381958008; -54.0 -10.000000953674 -37.615753173828; -54.0 -10.000000953674 -39.261665344238; -54.0 -10.000000953674 -40.727695465088; -54.0 -10.000000953674 -42.168701171875; -54.0 -10.000000953674 -43.820377349854; -54.0 -11.018865585327 -47.018901824951; -54.0 -14.0 -51.176284790039; -54.663269042969 -14.0 -55.0; -58.297706604004 -14.0 -55.0; -63.16588973999 -16.0 -55.0; -66.000007629395 -16.0 -55.526763916016; -66.000007629395 -16.0 -59.460041046143; -66.000007629395 -16.0 -63.24658203125; -66.000007629395 -16.0 -67.261924743652; -66.000007629395 -16.0 -71.199310302734], Dates.DateTime("2023-10-22T10:02:04"), "")]
 
     "Must be same as the second log in `sample_log.txt`"
     sample_log_2 = CoordVisualize.CoordLog{Float64}([895.0 7.0 -978.0; 895.0 7.0 -978.0; 895.0 7.0 -977.38684082031; 895.0 7.0 -975.71923828125; 897.0 7.0 -974.39855957031; 898.80633544922 7.0 -973.0; 901.38275146484 7.0 -973.0; 904.18518066406 7.0 -973.0; 907.25793457031 7.0 -973.0; 911.19061279297 7.0 -973.0; 915.05682373047 7.0 -973.0; 919.1259765625 7.0 -973.0; 923.12609863281 7.0 -973.0; 926.94378662109 7.0 -973.0; 930.82952880859 7.0 -973.0; 934.84539794922 7.0 -973.0; 938.83020019531 7.0 -973.0; 944.04681396484 8.0 -973.0; 948.01483154297 8.0148372650146 -973.0; 951.48193359375 9.0000009536743 -973.0; 955.5927734375 10.000000953674 -973.0; 954.96008300781 10.000000953674 -973.0; 958.39764404297 11.000000953674 -973.0; 962.41009521484 12.000000953674 -973.0; 966.17108154297 12.000000953674 -973.0; 969.40936279297 12.000000953674 -973.0; 969.47576904297 13.0 -973.0; 973.32684326172 13.0 -973.0; 977.21990966797 13.0 -973.0; 981.09814453125 13.0 -973.0; 985.05871582031 13.0 -973.0; 989.03479003906 13.0 -973.0; 992.83026123047 13.0 -973.0; 996.90203857422 13.0 -973.0], DateTime("0000-01-01T00:00:00"), "")
 
     sample_result = CoordVisualize.parse_log("sample_log.txt"; interactive=false)
+    @testset "equality" begin
+        @test sample_log_1 == sample_log_1_2
+    end
     @testset "parse" begin
         @debug sample_result
         @testset "parse with datetime" begin
@@ -49,4 +53,9 @@ using Test
             @test splitted_2.note == "latter one"
         end
     end
+
+    @testset "export" begin
+        re_evaled_log = CoordVisualize.export_log(sample_log_1) |> Meta.parse |> eval
+        @test re_evaled_log[1] == sample_log_1[1]
+    end
 end